The following links provide both information and games to reinforce what students should know!
The Periodic Table of the Elements Song!! Try to sing along! http://www.privatehand.com/flash/elements.html
States of matter game! http://www.scienceunleashed.ie/Games/States%20of%20Matter.swf
States of matter game http://www.quia.com/rr/38085.html
States of matter game! http://www.quia.com/custom/1858main.html
States of matter game! http://www.quia.com/hm/40795.html
NASA site for kids. All about the earth! http://kids.earth.nasa.gov/
Hangman for all types of science topics. Go to the site, then choose states of matter, plate tectonics, what have you! http://education.jlab.org/vocabhangman/index.html