Some of the following websites are for reading while others are for math. Some contain both. Check here regularly as I will try to update it with new and interesting websites that I find might be helpful. If you know of a great educational website, let me know and I will post it. Thanks :) P.S. Some websites require that you pay a small monthly fee to access their full site, however, they still allow you to practice some problems or participate in a demo.
IXL Math
FunBrain
Earobics
Eduplace
Starfall
Seussville
SmartMath by Britannica
A Math Dictionary for Kids
Math Playground
KidsReads
Spelling City
Keep Your Children Reading All Summer Long!
Here are some other resources that you can't find on the internet: Local Public Library