Homework Help
Education Place provides an extensive collection of online homework resources. There is also online support if your child is using a Houghton Mifflin textbook program.
http://www.eduplace.com/parents/homework.html

Berit's Browse: Homework Helpers
This article describes how to use the Internet for research assignments.
http://www.beritsbest.com/browse

About —Homework Help
About.com offers dozens of research sites for students of all ages.
http://home.about.com/homework/index.htm

Lab Archive
From the University of Washington Astronomy Dept., an archive of labs, assignments, & homework. Introductory astronomy. Some fun ones here.
http://www.astro.washington.edu/labs