A great resource for both teachers and students, Annenberg Learner offers free access to lesson plans, and self-guided content for students K - adult, including complete video courses and interactive exercises.
An encyclopedia and dictionary of topics kids may research in elementary and middle school, covering all school subjects. Resources for teachers, too!
A service of the Adams County Public Library, this site offers links to hundreds of kid-safe websites featuring learning games and homework help, organized by school subject.
Access free test preparation material and practice tests for K - graduate level tests, including SAT, ACT, GED, GRE, occupation, military, and citizenship tests, English as a second language, and more. Also offers software tutorials, computer basics, and basic skills courses for adults.