Additional Suggested Websites
Khan Academy With a library of over 2,800 videos covering everything from arithmetic to physics, finance, and history and 290 practice exercises, we're on a mission to help you learn what you want, when you want, at your own pace.
IXL An immersive K-12 learning experience that provides comprehensive, standards-aligned content for math, language arts, science, and social studies. (This is not a free site)
Scholastic's Math Hunt Scour the web for science and social studies information to crack math problems
Starfall.com A great site for K-2 students to practice reading skills.