(Sample link) White House for Kids http://www.whitehouse.gov/kids/whlife/index.html
(Sample link) National Geographic for Kids http://www.nationalgeographic.com/kids/
Yahoo for Kids http://kids.yahoo.com/
Great for studying states and capitals http://www.schoolexpress.com/funtime/states_capitals/states_capitals.php
States and Capitals Games http://www.sheppardsoftware.com/web_games.htm
Studying Math Facts Online or Printable http://www.helpingwithmath.com/resources/oth_flashcards.htm
Baseball Multiplication and Addition Game - Great for those facts!! http://www.prongo.com/math/index.html
Lots of fun math games and activities! http://www.mathcats.com/explore.html