Your students can also go to: razkids.com/ login to read on their own. Their classroom log in is: jmichael8. Once they are in the "classroom" they need to click on their name and then they should select the picture which is their password.
U.S. Mint for Kids
http://www.usmint.gov/Kids/flashIndex.cfm USA flags and symbols
Fun Brain activities for home and school
Government for Kids
All about place value