If you want to spend your time with use, visit PlaysCheckers.Com, there are a lot of flash games here. All the games are about checkers, you can find many variants of them: Russian, American, Chinese.
If you prefer the classic draughts, play Master Checkers by traditional American Rules. Play against computer or choose two players mode. The graphics are really cool. Also you can set the difficulty level.
To start the game you don't have to install any programmes or plugins. Just click on the picture.Rules are very easy, although you have to think hard to win. Try to block all the pawns of the rival, capture them. Move your men ahead to turn them into kings. Checkers is an interesting game, helps to develop your thinking skills.