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субота, 31. мај 2014.

How to study

Discover proven ways to study not just harder but smarter. Learn how you can create a detailed study plan, maximize the time you spend studying, take meaningful notes, and save time when preparing for exams—all while keeping stress levels low and your grades high.
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First, Understand that Studying is Not the Same as Doing Homework

Learn the difference between homework and studying, as well as how to approach each of these tasks. Discover five tips for effective studying in college, and explore how factors such as environment and outlook can affect your success while studying.

Create a Study Plan

See why it is critical to develop a study plan in order to be successful in college. Learn four steps to creating a realistic, effective plan of study, and explore ways to ensure you follow through with your personalized plan.

Manage Your Time

Discover the recommended amount of study time per credit hour, and see if you have been investing enough time in each course. Find out how to avoid the mistake of studying too much, and explore five tips for effective time management.

Take Effective Notes

Learn how to save time and energy by using effective note-taking strategies for both traditional and online classes. Explore ways to exercise good judgment when deciding what to write down. You can maximize your productivity by leveraging these tips for organizing and taking class notes.

Read Text Slowly Before and After Class

Explore ways to read more efficiently and get the most out of your textbooks. Analyze these steps of effective reading to see if you have been reading correctly. Learn how to reduce your study time by using these tips for smarter reading.

Study Smart Before Exams

Discover proven tricks to help you recall information on test day. You’ll find methods that work for different kinds of courses and exams. By using these memorization tips, you’ll cut down on your test prep time for each course and will be more likely to recall important information that will serve you in future courses, as well.

Use Test-Taking Strategies on Exam Day

Learn how you can perform better on test day by following some simple test-taking tips. Explore ways to be physically and mentally prepared, as well as tips to gain points on various sections of your tests. See how posttest strategies can help you master material and boost your score on future exams.

Maintain Your Studies

See how you can retain and build on what you’ve learned in your courses. Don’t let your knowledge and hard work go to waste. Explore ways to preserve valuable course materials and remain abreast of developments in your field.

Manage Your Stress

Learn the different kinds of stress and the symptoms of detrimental stress. See how you can recognize your own common stress triggers. You can develop ways to create a buffer and be prepared both mentally and physically to handle stressful situations during your academic career.

Exercise Your Brain for Optimal Memory Training

Explore ways to enhance your ability to recall information. Your brain is a like a muscle that needs regular and varied exercise. Learn ways to stimulate various parts of your brain and keep your brain healthy to improve your academic performance.

Appendix: Top Ten Resources

Discover resources that can supplement your classroom study and boost your grades. You’ll find free online resources designed specifically to help you in various college courses. You can also explore resources that help you manage your time and stress throughout your college experience.

Appendix: Other Study Tips

Browse this list of resources on a variety of topics that are vital to academic success. Find advice from reputable, accredited universities on how to study smarter and how to manage your time. View online discussions from professional educators and students on how to ace your exams.


Also :
- Make thing interesting
- Find a good study spot
- Clear your mind

How to play piano

Acquire a piano.

Most teachers recommend that you purchase an actual piano to keep and practice on at home. Pianos vary widely in style, size, and cost; for most people, a medium-sized upright piano is ideal, as it takes up less space than a grand piano and has much better sound than the most compact styles. Bear in mind that although it's possible to find pianos for cheap and sometimes even for free, it is dangerous and difficult to move a piano from place to place. Be sure you have a professional delivery service lined up to help you move your instrument.
When you acquire a used piano for little or no money off the private market, it's likely that you'll need to get it tuned and possibly even repaired before it will be usable. Check your local business listings to find someone who's willing to make a house call and assess your piano's condition.

It's acceptable to purchase a high-quality electronic keyboard if you must (for example, if you live in a tiny studio apartment), but it isn't recommended. You'll have more trouble learning proper posture and hand positioning than you would with an actual piano, and you'll never be able to exert as much control over the sound of a keyboard as you can with a decent piano.

Acquire accessories.

Once your piano is set in place and has been tuned and examined by a professional, it's time to get a bench and some music to play. Many pianos come with a bench; otherwise, they can be found at thrift stores and music stores. Try to get an adjustable bench, as bench height is very important to ensuring proper posture. Don't use a dining room chair or an ottoman as a substitute unless it naturally places you at the ideal height for playing.

Ask your local music store for recommendations on basic, easy-to-play music books. It's likely the clerk will know of at least a couple of books you can use. Try to get one book that encapsulates beginner advice in the front and contains scales and arpeggios, and one book with simple, complete songs to practice, such as old folk songs.

If you have trouble keeping a rhythm, buy a metronome. A metronome sits atop your piano and ticks like a loud clock at a pace you set for it. It's a useful aid for maintaining a steady tempo as you begin to get better at playing.

Set up for proper posture.

Sit on your piano bench with your music books on the sill of the piano, above the keyboard. Point your forearms towards the keys until they're parallel to the floor. If your bench is at the proper height, your fingers should gently arc downward and rest on the tops of the keys, without you having to bend your wrists or raise or lower your arms. Adjust the bench height until you feel no strain in your arms or shoulders when you sit at the piano.

Rest your feet flat on the ground, a comfortable distance apart, with the toes pointing straight ahead. Sit with a straight back - your shoulders shouldn't hunch forward, and your spine should be straight. Scoot in until your hands rest on the keys without having to stretch your arms. You should be able to move your feet forward to the pedals and back again without putting any strain on your upper legs.

If you don't have an adjustable piano bench, or it won't adjust high enough to make you comfortable, it's acceptable to use pads or pillows to further raise the height of your seat. Just be sure they're even in terms of thickness, and stable enough that you won't have to worry about them slipping as you play.

Double check your hand position. You should be seated at the center of the keyboard. Each of your ten fingers should rest on one white key. Your right thumb rests on the white key just to the left of a group of two black keys in the middle of the keyboard, which is the C note. Each finger on your right hand rests on the next following white key, thus D, E, F, and G. Your left hand follows the same pattern one octave down, only reversed: the left pinky should rest on C, and the left thumb should rest on G. There should be two white keys (A and B) between your thumbs.

The C note that anchors your right thumb is in the center of the keyboard, and as such is often called “middle C.” It's common for beginning players to use a sticker or a piece of tape to mark middle C. Just be sure it's something you can eventually clean off as you get better.

Learning the notes at the center first is conventional because a pianist must normally sit at the center of the keyboard to be able to reach every high and low note without standing up and moving.

Learn about the keyboard.

The keyboard of a piano repeats its notes from top to bottom across several octaves. This means that the notes change from low (left side) to high (right side), but don't vary in pitch. There are twelve notes a piano can produce: seven white key notes (C, D, E, F, G, A, B) and five black key notes (C-sharp, D-sharp, F-sharp, A-flat, and B-flat). Playing the white key notes from C through B and back to C creates a regular eight tone octave scale in C major; playing the black key notes from C-sharp (next to the white C key) through B-flat creates a pentatonic (five tone) scale. You can play every key (both black and white) from C to C in order to create a chromatic or twelve-tone scale.
The piano is tuned for C major, since it's a very common key. However, other keys can be played by mixing black and white keys to get the proper sharps and flats for each note. Any of the keys normally seen in sheet music can be played on a piano, making it a very versatile instrument.
It's easy to double-check a piano's tuning by playing pairs of the same note at different octaves. The notes should sound identical; if they don't, one or both of them is sharp or flat and needs to be re-tuned.



Play some notes.

Starting with middle C, gently but firmly push down on a key to produce a note. Take some time and try pushing slower and faster, softer and harder, until you have an idea of the kind of control you can exert over the sound of the piano. Without moving your hands, play all ten notes under your fingers. Note that some (such as the pinky) are more difficult to play loudly, while others (like the thumb) take practice to play softly.
Play black keys as well. Generally speaking, black keys are played by moving the appropriate finger up and to the right, except in the case of the thumb, since it's difficult to move the thumb up to play a black key without ruining your hand position. From the middle C position, your pointer finger can move left and right to play C-sharp and D-sharp, respectively.

Play scales.

Try playing notes starting with the pinky C of your left hand, all the way up to the thumb C of your right hand. Play each white key in order. Once you reach your left thumb, stretch it to play the next note up (A), and then stretch your right thumb to play the next after that (B), returning your thumb to middle C to finish the scale. Practice this until it begins to get easier – stretching your fingers is just as important as moving your hands, as your skills begin to improve.
Try playing a different scale. Start on one of the other fingers of your left hand, and play notes up the keyboard until you reach the same note on your right hand. Adjust sour notes by using black keys where necessary. This is how other scales aside from C major are played. For example, the D major scale is played D (left ring finger), E, F-sharp (black key), G, A, B, C-sharp (black key), D (right pointer finger).
In addition to learning scales from a teacher or book, it's important to keep experimenting with them on your own so that you begin to get a head for them as quickly as possible.


Learn about harmony.

Although it doesn't take a lot of practice to be able to bang out “Hot Cross Buns” on a piano keyboard, unlocking all of your instrument's potential requires learning to play multiple notes at once on it, using all your fingers and both your hands. To achieve a nice sound with multiple notes, you have to understand how harmonies work. This is a very in-depth topic that can't be covered in full here, but you can use these notes to help guide your practice.
Adjacent notes never harmonize. That doesn't mean they don't have their place in certain advanced compositions, but for now, remember: playing two notes right next to each other rarely sounds good. Harmonies are created by increasing the space between notes.
The space between a harmony's notes is called its “interval.” The most common intervals in piano music are fifths, fourths, and thirds. To hear examples of these, play C and G, C and F, or C and E, respectively.
Harmony intervals go all the way up to the fourteenth interval, which is considered a compound interval since it crosses more than one octave. Harmonies can also be altered by introducing flat or sharp notes, adding support notes, and so on. However, you shouldn't have to worry too much about these more advanced styles for a while yet.
Playing the same note at two different octaves is called a “unison” harmony.

Related links :
http://www.instructables.com/id/7-Steps-to-Learn-How-to-Play-Piano/
http://www.true-piano-lessons.com/how-to-play-the-piano.html

How to play drums

On this page you will find links to drum lessons designed to enlighten and challenge drummers of all skill levels. It doesn't matter if you are a complete beginner (with no sense of time at all), or a long-time pro looking for new beats and fills. These drum lessons will show you how to play the drums with more confidence!
You can get started by selecting drum lessons from the list below. They are organized by difficulty, so you can easily find material that suits your needs. Beginners should definitely start in the "beginner" section, but intermediate and advanced may prefer to jump around and try a little of everything.

Fundamental Lessons

Beginner Lessons

Intermediate Lessons

Advanced Lessons

Live Drum Lessons

Drum Solos & Play-Alongs

Single Stroke Rudiments

Drum Roll Rudiments

Paradiddle Rudiments

Flam Based Rudiments

Drag Based Rudiments

How to create a skype account

Skype is a freemium voice-over-IP service and instant messaging client, currently developed by the Microsoft Skype Division. The name was derived from "sky" and "peer".
Skype was first released in August 2003. It was created by Janus Friis (Denmark) and Niklas Zennström (Sweden) in cooperation with Ahti Heinla, Priit Kasesalu, and Jaan Tallinn (Estonia), who supplied the backend which was also used in Kazaa. Skype had 663 million registered users as of the end of 2010. It was bought by Microsoft in 2011 for $8.5 billion. Microsoft's Skype division headquarters is in Luxembourg, but most of the development team and 44% of the overall employees of the division are still situated in Tallinn and Tartu, Estonia.
The service allows users to communicate with peers by voice using a microphone, video by using a webcam, and instant messaging over the Internet. Phone calls may be placed to recipients on the traditional telephone networks. Calls to other users within the Skype service are free of charge, while calls to landline telephones and mobile phones are charged via a debit-based user account system. Skype has also become popular for its additional features, including file transfer, and videoconferencing. Competitors include SIP and H.323-based services, such as Linphone and Google Hangouts.
It's very easy to make a skype account, just follow these steps :

1.Once Skype is installed, run it and click "Create an account". Then, just fill in the required fields:







It's done ! Your skype account is ready.





 
 
Related links : 

How to create a facebook account


Register a Facebook account. Under the words “Sign Up” on the homepage, put your first name in the first box and your last name in the second box. Next enter a valid email address and re-enter that email in the box below. This is so that Facebook can contact you for confirmation of your registration and in future send you updates from your profile. Next enter a password of your choice, your sex, and your birthday. Then hit the Sign Up button at the bottom of the page.

Confirm your email. Facebook will now tell you it has sent a confirmation email to your email account. You must now login to your email. Open the confirmation email from Facebook, click on the link it provides and it will take you to you new Facebook profile.

Find friends. You'll now have to go through a series of steps to personalize your profile. First, Facebook will offer to scour your email address book for addresses of people that also have Facebook profiles, giving you a chance to add them as your friends. Simply enter your email address and password and Facebook will find your friends. Select the ones you want to add by ticking the boxes to the left of their pictures and then click Add to Friends at the bottom. After that, you’ll have the option of choosing friends from your email address book who aren't on Facebook and sending them Facebook invitations.

Find classmates. Click the Find My Classmates button. Next, choose the country, city, name of your school, and the class year (if you are searching for a specific person, just type in their name), then click Search for Classmates. Now select anyone you recognize or want as a friend and click Add to Friends. You may have to write the text from the security box into the text box to confirm.

Find workmates. Click on Search For Your Co-Workers. Write the name of the company you are looking for and the name of the employee if necessary. Then, click Search For Your Co-Workers to see what Facebook digs up.

Join a regional network. This is useful because people within the same regional network can see more of each other’s profiles even if they aren't already friends. Joining a regional network also means it's easier to track down friends. On your Facebook setup homepage, there is the option to enter a city or town. Put in your home city and click Join.

Edit your profile. Click on the My Profile button, where you'll see that all the sections are empty. You don't have to fill out every field; in fact, you can leave them all blank if you so choose. Remember, Facebook is public, so think before you enter personal information.

Add a profile picture. Click on the Picture tab to upload a picture from your hard drive that other people will be able to see as your profile picture. Click Browse, find a picture on your hard drive, tick the box to certify that you own the rights to the image, then click Upload Picture to confirm. You can also use a webcam to take your picture, Click Take from Webcam and click the camera button when you're ready. It will be delayed for 3 seconds and then take the picture. Then click Use Picture to confirm Note: Cover Images and Profile Pictures both are public and anyone visiting your page will be able to see them. 

Add a Cover picture. A cover is the larger image at the top of your Page, right above your Page's profile picture. Click Add a Cover and then choose whether you want to upload a new photo or pick a photo from one of your existing photo albums once you choose a photo, you can reposition it by clicking on the image and dragging it up or down and then Click Save after you've repositioned it. Note: Cover Images and Profile Pictures both are public and anyone visiting your page will be able to see them.

Related links :
http://www.wikihow.com/Make-a-New-Facebook-Account
http://www.wikihow.com/Create-a-Facebook-Profile


How to create a twitter account

Creating an account on Twitter is easy. There are a few steps you can follow to make your experience on the site valuable.
Log On and Create a Twitter Profile

The first step in learning how to create Twitter account is to sign up for the service as a new user. When you first visit the site, you will see a page that gives you the option of starting a new account. First, you will be asked to create a username. If you are using the site for personal use, using your own first and last name will make it easier for your friends and colleagues to "follow" you. If you intend to use Twitter for business, using your business name will make it easier for customers to find you on the Web.

Select Your Avatar

The avatar you use as your Twitter profile picture is the photo that will accompany all of your discussions on the site. You can use a personal picture or one that represents your business. Choosing the right avatar is important because it gives people an overall picture of who you are and what you stand for.
Select a header image that will be prominently displayed on the site. This image will best represent your brand and stand out on your profile.

Customize Your Profile

In addition to the basic Twitter profile, you can express your creativity by choosing a Twitter background image that reflects you or your business. Twitter supplies a variety of background images that convey a range of messages. You can choose from fun images like bubbles and stars or upload your own image for a custom look. To change your Twitter background image, simply go to the "settings" menu on your account. Under settings, you will see an option for "design."
In this menu, you will have the option to change your background image. There are two options for displaying your photo. You can either select an image that is "tiled" or flat. "Tiled" means that your image will appear as a repeating pattern behind your profile. A flat image appears just as it is normally, as one solid image. Choosing a background image makes your profile stand out and will attract more viewers and followers.

Get Connected

When you register your new Twitter account with your existing email account, Twitter will search your contact list to find out if any of your contacts are registered on the site. This helps you easily connect to friends, coworkers and customers who are already on the site. You can elect to skip adding new Twitter connections, but most users find it helpful when first learning how to create Twitter account.
If there are people you would like to connect with who are not on Twitter, there is an option to send them an invitation to use the site. This is great for businesses that have extensive contact lists of clients and customers. You can also use this option to communicate with friends and family who don't already use the site.

Create a Plan

One of the biggest mistakes that businesses make when using social media is jumping in with no plan in mind. If your goal is to add new contacts, set measurable milestones that will help you to achieve this. If you simply want to get a feel for what other people are talking about, you can do this by monitoring trending topics and participating in discussions. When thinking about how to create Twitter account, keep your goals in mind and measure your progress accordingly.

How to create your first Android app (with pictures)

App Inventor lets you create Android apps without any knowledge in programming. How cool is that! Thanks to Google. You design your apps on a web page, assemble pieces of logic blocks together on an editor, test your app on an emulator or on your phone while you are designing; cool, huh? Your projects are hosted by Google. All you have to do is design and join the pieces together like a puzzle game.

WildLifeShow 1.png 
 On your browser, go to My Projects. Click the New button to create your app app. This will make a new dialog box to open.


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Now drag a Vertical Arrangement component on Screen1 window where we will display our images later. This will create a vertical arrangement component on our Screen1. The name of the component will be automatically VerticalArrangement1. 

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All the components you drag to Screen1 can be seen under Components pane. We need to change some properties of the VerticalArrangement1. Select VerticalArrangement1 under Components pane. On Properties pane you will see the properties of the component you selected. Change VerticalArrangement1's Width to Fill parent and Height to 350 pixels.  

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Drag an Image component and place it inside VerticalArrangement1 component that we placed earlier on Screen1. Note that the name of Image component is Image1  

WildLifeShow 7.png 
 
Get a Label component and place it below VerticalArrangement1. Take note of the name of our Label component which is automatically set to Label1. 

We need to change some properties of the Label component. Select Label1 under Components pane and change the following-
  • Check the Font/Bold property.
  • In the Text property, type Tap On A Button To Hear Them. You can type anything you like.
  • Change the Text Alignment to center.
  • Set Text/Color to Blue.
  • Change the Width to Fill parent.
WildLifeShow 8.png 
 
  1. WildLifeShow 9.png 
    Now we need a Horizontal/Arrangement component where we will place our three buttons. Get a Horizontal/Arrangement component and place it below our Label component. Take note of the name HorizontalArrangement1.
     
  2. WildLifeShow 11 1.png
    11
    We also need to play sound. For us to be able to do that, drag a Player component and place it anywhere on Screen1. Since Player is a non-visible component, this will appear underneath Screen1 window.
  3. AppInventor WildLifeShow 27.png
    12
    One more tiny thing we should do is change the Title of Screen1 to Wild LifeShow. For us to do that, select Screen1 on Components pane and change the Title property under Properties pane to Wild LifeShow.
  4. 13
    Let's get our picture and sound files added. For our app, we used the following image and sound files which you should download to your computer.
  5. 14
    Under Media pane, click Add and upload the image and sound files one by one.

    WildLifeShow 12.png
  6. 15
    You should see now the following under your Media pane.

    WildLifeShow 13.png
  7. 16
    Now that we are done with the design portion of our app, we need to implement the interactions among the components we have. For instance, we want the Elephant picture to be displayed and Elephant sound file to be played once Button1 is clicked. In order to do that, we got to open the Blocks Editor window. Click on the Open the Blocks Editor button.

    WildLifeShow 14.png
  8. WildLifeShow 15.png
    17
    On the Blocks Editor window, click on My Blocks which will display all the components we placed on our app through Designer/Viewer window. Locate Button1 and click on it. Now we can see all the events and different properties of Button1. Select and drag the Button1.Click event block on the Blocks Editor space as shown below.
  9. WildLifeShow 16.png
    18
    Now under My Blocks, locate and click Image1. This will show the events and properties of Image1. Get the Image1.Picture and place it inside the Button1.click block. Once you place it, you should hear a click sound which means the blocks are properly connected to each other.
  10. WildLifeShow 17.png
    19
    We need to set the source of the picture to our image Elephant.png. To do that, click on Built-In tab, then locate and click Text block. Drag the text block over to the right and connect it to Image1.Picture block.

    WildLifeShow 18.png
  11. 20
    The text block indicates which picture to display. Click on text of text block and change it to Elephant.png. Careful with the casing. If you have saved the Elephant.png file as elephant.png, then type elephant.png.

    WildLifeShow 19.png
  12. WildLifeShow 20 1.png
    21
    Now locate the Player1 and place the Player1.Source block below Image1.Picture block. Connect a text block to Player1.Source block and change the text of text block to Elephant.wav.
  13. WildLifeShow 21 1.png
    22
    Grab and place Player1.Start block below Player1.Source block.
  14. WildLifeShow 22 1.png
    23
    Do the same thing for Button2 and Button3. For Button2, use Bird and for Button3, use Penguin. Your blocks should look like the snapshot below.
  15. 24
    You are done! Now it's time to see our app in action. If your Android device/phone is connected to your computer, you can click on Package for Phone on Designer/Viewer window in your web browser and then choose Download to Connected Phone. This will install the app on your phone.

    WildLifeShow 25.png
    • If you don't have a phone connected, you can launch an emulator from the Blocks Editor window. Click on New emulator and it will launch an emulator for you.

      WildLifeShow 23.png
    • After the emulator is launched, click on Connect to Device... button. You should see the emulator that you just launched. Click on that and it will load the app on the emulator.

      WildLifeShow 24.png
 

How to make money with Google Adsense

Make Money With Google AdSense

Interested in making money with Google?

Here's your complete guide to getting started along with some info on how to maximize your earnings, why some accounts are disabled and even alternatives to AdSense.
 
Google’s AdSense is a revenue-sharing opportunity for small, medium and large web sites that places ads for goods and services that are relevant to the content of your site, targeted to the people who frequent your pages. In turn, you get paid a small amount when the ad is either displayed on your page, or clicked on. We'll show you some good ideas that added to your own, will help increase your AdSense revenue.

Google offers three ways to make money from them :

Google AdSense for Content - A variety of size and shape ads for placing in your content are available. These can be text or image ads or both - you specify what you'll allow. Ad units are full ads. Link units are simply a strip of text links that your visitors might want to click. Google allows you to put up to 3 Ad Units and 1 Link unit on each page of your Web site, provided you follow its policies - both for AdSense and for Webmasters.

Google AdSense for Search - This places a search box on your Web site. When a user enters a term and conducts a search, a search results page opens, that hosts more pay-per-click ads. You can customize the color scheme of the search results page to harmonize with your web site.

Google Referrals - Here you make money by referring visitors to use a Google product, like AdSense, AdWords, the Google Toolbar and other Google software. Just like Google AdSense for Content and AdSense for Search, Google generates the code that you paste into the desired location on your web page. You can choose from a wide variety of buttons and text links of different colors. As an example of how Google Referrals works, if someone goes to your site and clicks the link and signs up for an AdSense account, when that person earns a $100 from Google AdSense and receives a payout from Google, you'll also receive $100 for referring them. This is a great idea to me, because you can be the world's worst Google AdSense advertiser, but if an ad dynamo happens to visit your site and uses your referral link, you can make money anyway!

There are many tutorials about how to make many with google adsense :  

http://www.2createawebsite.com/money/google-adsense.html 

http://www.wikihow.com/Earn-Money-Through-Google-Adsense

http://homebusiness.about.com/od/internetmarketing/a/adsense.htm

 

How to play American football

American Football is one of the biggest North American sports. Whilst the game is played worldwide, the professional leagues in North America (such as the NFL) easily attract the best players in the world making its leagues the most competitive. The pinnacle of the sport comes in the form of the Super Bowl played out every year to millions of people around the world.

 

The goal of American football is to score points by carrying the ball from a starting point on a 100-yard long by 52-yard wide field into a specially marked ten-yard-deep zone at either end of the field called an end zone. Each team uses the end zone in front of them to score, while trying to prevent the opposing team from reaching the end zone behind them. Each end zone has a Y-shaped structure at its outside edge called the goal post, which is used to score points with kicking plays.

The end zone that a team is defending is usually referred to as “their” end zone. Thus, a team with 70 yards to go before it can score a touchdown is 30 yards from its end zone.
Teams trade possession of the ball according to strict rules. Whichever team is in possession of the ball is known as the “offense;” the other team is called the “defense.”

Football is divided into four quarters of 15 minutes each, with a break between the second and third periods called “halftime” that is normally 12 minutes long. While the clock is active, the game is divided into even shorter segments called “plays.” A play begins when the ball is moved from the ground into the hands of the players, and ends when either the ball hits the ground, or the person holding touches at least one knee to the ground. When a play is over, the players have 40 seconds to reset the ball in the middle of whatever yard line it stopped at and get into team formations before the next play must begin.

Play time can stop for a few different reasons. If a player runs out of bounds, a penalty is called, or a pass is thrown but not caught by anybody, the clock will stop while referees sort everything out.
Penalties are indicated by referees, who throw yellow flags onto the field when they see a violation to let everyone on the field know that a penalty has been called. Penalties normally result in the offending team losing between 5 and 15 yards of field position. There are many penalties, but some of the most common are “offside” (someone was on the wrong side of the line of scrimmage when the ball was snapped), “holding” (someone grabbed another player with his hands instead of tackling him properly), and “clipping” (someone contacted an opposing player other than the ball carrier from behind, and below the waist).

Kickoff: At the very beginning of the game, team captains flip a coin to decide who will have to kick the ball to the other team, to start the game. This initial play is called the kickoff, and typically involves a long kick down field from one team to the other, with the team that kicked the ball rushing towards the team receiving the ball in order to prevent them from running the ball a long ways back towards the kicking team's end zone. After halftime, there is a second kickoff from whichever team is in possession of the ball to the other team.
Downs: The word “down” is synonymous with the word “chance” in American football. The offense is allowed four downs to move the ball at least 10 yards towards the end zone. Each play ends in a new down. If the goal of 10 yards from the first down is achieved before the fourth down is over, the count resets to the first down, commonly noted as “1st and 10” to indicate that the standard 10 yards are once again required to reset to the first down. Otherwise, the downs count from one to four. If four downs pass without resetting to the first down, control of the ball passes to the other team.

Generally the most common type of play seen in football is the running play. Running plays tend to yield less yardage per play than passing plays, but are much less likely to accidentally transfer control of the ball to the other team. They have the added advantage of getting the football out of the quarterback's hands quickly, before an aggressive defense can reach his position and cost the team extra yards. If the ball is dropped during a running play, it is called a fumble. A fumbled ball can be picked up by the other team to gain control of it. 

Slightly less common than the running play, the passing play is a great way to make up lost yards quickly... if the pass is completed. Short passing plays are often used in combination with running plays as well, to keep the defense on its toes. The great advantage of a passing play is its ability to completely circumvent a tough ground defense. Incomplete passes (wherein nobody catches the ball after it is thrown) stop the clock and end the play.

By far the best way to get better at playing football is to practice regularly. The game uses a special skill set that is not seen very many other places in life, so consistent work is required to improve the way you play. 

This guide only lists the most basic elements of play. Team formations and strategies go far beyond the information presented here. Read up on some of them and think about how your team can use them to gain an advantage on the field. 

Players & Equipment

Whilst there are only 11 players from each team on the field at any team, an American football team is actually made up of 45 players. The teams are generally split into three groups of attacking (generally smaller, stronger, faster type of players, including a quarterback who is said to run the attacking plays and throw the ball to their teammates), defence (larger, more powerful players designed to stop players from running) and special team players (responsible for the kicking and punting side of the game with a mixture of larger and faster players).
An American football field is generally around 100 yards long and 160 yards wide. Lines are drawn on the field at 10 yard interval to indicate how far each team has to go before reaching the end zone. The end zones are added at each end of the pitch and are roughly 20 yards in length each. Posts can also be found at each end of which the kicker kicks the ball over.

Scoring

When a player scores a touchdown six points are awarded to their team. A touchdown can be scored by either carrying the ball into the end zone or receiving the ball from a pass whilst in the end zone. After a touchdown has been scored the attacking team have opportunity to kick the ball for an extra point. The ball must pass between the upright posts for a successful kick.
A field goal can be scored from anywhere on the pitch at any time (usually on the final down) and a successful kick will result in three points. A safety is where the defensive team manages to tackle an attacking opponent in their own end zone; for this the team will receive 2 points.

Winning The Game

The team with the most points at the end of the game will be deemed the winner. If the points are tied then over time will come into play where the teams will play an additional quarter until a winner is found.

Related links :

http://www.rulesofsport.com/sports/american-football.html
http://www.wikihow.com/Play-American-Football

How to play tennis

Have you always wanted to learn to play tennis, but you've been unsure of where to start? Do you love watching Rafael Nadal or Novak Djokovic dominate the courts? Playing tennis is a great way to build speed, power and fitness as well as a great way to spend time with your family or your friends. Follow these steps to learn how to do it.

Step 1: Choosing a raquet

When looking to buy a raquet, you should figure out the level of play you are at.

Beginners might want to choose a head that is wider, which reduces the chance of missing the ball. More experienced players might want to choose a more narrow head which has more power and accuracy.

The material used for the raquet are nowadays synthetic materials such as composites and others. Wood is out of date, but you can always go old school.

Younger players might want to choose a raquet that is lighter so it is easier to hit the ball. As you grow older, you will become stronger, and a heavier raquet will be needed.




Step 2: Master the court 

The tennis court has two sides that are separated by a net in the middle. Each court has two sides; the deuce side, or the right side of the court, and the ad side, or the left side of the court.The court has alleys on either side, and if one player hits the ball in his opponent's alleys in a game of singles, he loses the point.Each court has a right service box and a left service box. The server's goal is to serve the ball into the service box on the opposite side on his opponent's team. So, if the server is standing on the deuce side (the right side) of the court, he needs to serve the ball into his opponent's right service box.Each player's court is framed by the baseline at the bottom and the singles sidelines on each side of the court. One player's ball must land on or within these lines of the opposing players court during a rally (any point after the serve) to be considered in.

Step 3: Serve the ball

Start by standing on the "deuce" side of the court behind the baseline and serve the ball to the box that's across the net and diagonal to you. You have two chances to get your serve in. If you don't get your serve in the first time, it's called a fault; if you don't get it in the second time, it's called a double-fault and you've lost the point and have to move to the opposite side of the court.

If the ball hits the net and then bounces in to the service box, then it's called a "let" and you can play the point over again. If it hits the next and bounces back into your side of the court or outside the service box on the other side of the court, it's a fault.

Step 4: Play until someone hits a winner or commits an error

A winner means that the ball bounces in the court, but the person can't hit it back. An error means that you either hit the ball out of bounds or hit the ball into the net.
The winner of the first point gets 15. The loser of the first point is scored at "love." If the server wins, the score is 15-love. If the returner wins, the score is love-15. The server will always say their score first.

Hit a forehand : 

Start by grabbing your racquet with your dominant hand, as though you're shaking hands with it. Here's how to do it:
Step forward with the foot on your non-dominant side. Turn at the waist and pull your dominant arm back to swing the racquet back behind you. You'll need to wind up to generate momentum for your forehand. Turn to the side so that your shoulder is pointing in the direction where you want the ball to go.
Swing your entire arm forward to hit the ball. Don't twist your wrist. Hit the ball in the center of your racquet strings, the "sweet spot" of the racket.
Bring the racquet across your body toward your opposite shoulder. This motion is called the follow-through. The racket should swing upwards at the end, to generate enough power to move the ball over the net. If you swing your racket across your body and end at your other side instead of your shoulder, the ball will go into the net.
Hit a backhand :
The 2-handed backhand is the easiest to master. Here's how to do it:

Grab your racquet with your dominant hand as though you're grabbing a hammer. Your dominant hand should be near the bottom of your racquet handle.

Grip your racquet with your non-dominant hand by placing your other hand above your dominant hand on the racquet handle.

Twist at the waist and pull your racquet back on your non-dominant side. Your dominant forearm should be facing the net. Turn at the side so your shoulder is pointing where you want the ball to go. Bend your knees to generate more power.

Turn at the waist and use the power in your non-dominant arm to hit the ball across the net. Bring your racquet to your non-dominant shoulder to follow through.

To hit a one-handed backhand, just hold the racket with your dominant hand and don't put your non-dominant hand on it. Bend at the knees to generate power and hit the ball in the center of your racket, just as you would with a two-handed backhand. If you can master this stroke, you can generate a lot of power, but it's harder to be precise.
Perfect your serve :
Stand behind the baseline near the center of the court with your non-dominant foot out in front of you. Hold your racquet in your dominant hand. Point your shoulder in the direction where you want the serve to go. You can bounce the ball on the ground a few times to generate stability. Here's what you do next:

Toss the ball straight up into the air with your non-dominant hand. Toss the ball just a little bit in front of you, high above your head. At the same time as you toss the ball, pull your racquet upward and position it behind your dominant shoulder.
Bend back at your waist, and bend your knees.

Hit the ball. Use not just your arm power but also the explosive power generated by straightening your back and your knees to propel the ball over the net. The ball should land in the service box that's diagonal to where you are standing.

Think of it as hitting the ball at the top of its arc, as if you're reaching over a fence to hit a ball just on the other side, creating an arc that powers the ball forward.

Game-Set-Match

Simply put, a tennis match is a competition played between two, three (Canadian Doubles, Australian Doubles, etc.) or four players.
Singles, Doubles, and Mixed Doubles are the three most common types match competitions played in tennis.
Singles is a match between two players. As a competitor, you are considered your own team.
Doubles is a match between four players. Two players are on each team. You and your teammate are depending on each other to play together as a team.
Most tennis tournament matches are gender, competitive level, and age specific. Depending on the competitive level and age of the tennis player(s), matches consist of men vs. men, women vs. women, boys vs. boys and girls vs. girls.
Mixed-Doubles tournaments are the exception. A Mixed-Doubles match is similar to a doubles match with the difference being the gender make-up of the teams. Each team consists of the pairing of a man and a woman on each team.
First things first. It is important to note as you are learning how to play tennis and before you start any tennis activity for that matter, please take the time to stretch out and warm up thoroughly.
This will prevent possible injuries and also give you time to scout out your competitor’s strengths and weaknesses.
Time to play tennis. To initiate a match, tennis players decide amongst themselves who or which team will serve first and who will be on what side of the court to start a match.
There are several ways to decide this, but most competitors either flip a coin (heads or tails) or spin a racquet (letter or symbol on the bottom of the racquet is up or down).
Generally, the player(s) who wins the toss decides either who serves first or what side to start on.The player(s) who lost the toss decides the other option.
A tennis serve initiates game play. The moment the tennis ball is served, the battle to win that point begins. Tennis players return the tennis ball back and forth until the point is played out.
The goal is to win the point by strategic game planning and game play.
Points are won when your opponent…
  • is unable to return the ball before it bounces twice.
  • strikes the tennis ball into the net.
  • returns the ball and it lands out-of-bounds.
  • double faults when serving.
When your opponent successfully executes a return to your side of the court, it is your task to return the ball by performing…
  • a forehand or a backhand ground stroke. A ground stroke is when a tennis player returns the tennis ball after it has bounced once with in boundary lines.
  • a volley. A volley is when a tennis player connects with the tennis ball in midair before it bounces.
Points are lost when you …
  • are unable to return the ball before it bounces twice.
  • strike the tennis ball into the net.
  • return the ball and it lands out-of-bounds.
  • double fault when serving.
There are many tutorials about how to play tennis, so check them out :