Basics about Baseball:
1- Hitting - http://www.wikihow.com/Hit-a-Baseball
Gives you every step on how to hit a baseball and tips.
Step by step on what to do in the moment of fielding a baseball from easy to hard.
3- Throwing baseball - http://www.livestrong.com/article/412974-what-are-the-steps-to-throwing-a-baseball/
Tips on how to throw the baseball correctly to the target wanted.
These are the three most important things that any baseball player will be using in a game and the basic of the game.