www.number2.com gives great immediate feedback on SAT and ACT questions. You need to sign up for it but it is free.
http://www.freerice.com/ is vocab game. It derives its name from the fact that as you play the game, ad money is generated and donated to buying rice for those in need. The best way to learn vocab is still by reading though so check out some of novels which include and explain SAT vocab below!Read More