Charles Haskell Book Catalog:
AR Seach Page: You can look up any book and see how many points/ level/ avaibility of book. You can also type in your reading range and see what books come up in your range, or narrow it down as much as you want.
Everyday Math: The login information will be located in your agenda
National Geographic Kids:
World Book Encyclopedia:
Kids Konnect: Lots of activities and information on just about everything!
http://www.ixl.com/math/grade-3 Listed by just 3rd grade skills
http://www.ixl.com/math/topics Listed by topic, then grade level (easier to find a specific activity)