This gives questions that you can answer

http://misterguch.brinkster.net/practiceworksheets.html

This guy has a ton of worksheets for high school chemistry with answers

This gives quizzes and answers

http://antoine.frostburg.edu/chem/senese/101/tutorials/

The physics classroom gives explanations and quizzes I believe

http://www.physicsclassroom.com/Default2.html

This site has some more advanced stuff, but has good interactive things that really help explain laser cooling and lasers and quantum mechanics…

http://www.colorado.edu/physics/2000/index.pl

btw, if you just google ________ tutorial you’re pretty likely to get specific subjects too.

Hope that helps.