http://tutorialized.com/view/tutorial/Learn-to-make-Pong-in-AS3/73954

http://tutorialized.com/view/tutorial/Scary-maze-game-in-Actionscript-3/57360

http://tutorialized.com/view/tutorial/Simple-shooting-game-in-AS3/66793

  Well the top link is a link to a Tutorial teaching you how to use Adobe Illustrator AS3 or Action script 3.0 and make a Ping Pong game. Its a very interactive game that is simple to create while you can throw your own spice into it. The second link is a Tutorial to create the Scary Maze game and if your familiar with this it is very fun to play or play a trick on your friends. This tutorial is also simple but makes it easy for beginners to start their first flash game. Then there's the third link which is also a very interactive game and simple to make. But, this one is something that can you can get creative or it might be inappropriate for school.