Listed are a few of the websites I really enjoy. They can be useful for homework help, as well as, review of the material we are working on in class. Some of them are just for fun.
http://www.sciencenewsforkids.org/
http://ee.qctimes.com/ user name and password needed
http://education.jlab.org/indexpages/elementgames.php (this is one that they all love, it is general science games)
http://www.science-class.net/Physics/force_motion.htm
http://www.funbrain.com/periodic/index.html
http://www.funbrain.com/hangman/index.html
http://www.funbrain.com/cgi-bin/who.cgi?A1=s&A15=science&Submit=Show+Me+The+People%21&A2=0
http://classroom.jc-schools.net/basic/sci-phys.html
http://doe.sd.gov/octa/ddn4learning/themeunits/elements/activities.htm
http://education.jlab.org/indexpages/elementgames.php
http://www.nclark.net/PeriodicTable
http://education.jlab.org/qa/archive_idx.html