Students can visit these websites to enhance their knowledge about the game of dodgeball.

http://www.howtodothings.com/sports-and-recreation/a4346-how-to-play-dodgeball.html this website gives you the basics on how to play the game of dodgeball.
http://www.dodgeballusa.com/rules.html this website gives you the official rules of dodgeball.
http://www.dodgeballusa.com/gear.html here you can find some gear and equipment used in playing dodgeball.
http://www.funandgames.org/games/GameDodgeball.htm this website gives you different variations to the game of dodgeball.