Chemistry
Study Cards - AP
Animated Molecules
Mole Hole
Classifying Reactions
College Board - AP
Flinn Scientific
Chem4Kids
ChemTutor
College of Chemistry
Univ. of California
The
Mole Hole
contains many other interesting sites. After going to the Mole Hole, click on ChemTeam. This site has a lot of interesting links, including a really good humor site.