Music learning resources galore! There are many free printable resources for learning piano, music theory, composers and other musical elements. There are also loads of lesson plans and links. Some products are not free, but reasonably priced, and you can purchase an annual subscription for access to everything.
This online program provides adaptive reading passages on history and science.
This resource provides virtual manipulatives and online lessons for math learning.
An inexpensive, rule-based spelling program.
Another site with videos for elements in the Periodic Table.
This site is an interactive atlas, timeline and encyclopedia of world history.
A no-frills, free online typing course.