(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/
Fern Bluff Elementary http://www.roundrockisd.org/fernbluff/
BrainPop http://www.brainpop.com
Starfall Reading http://www.starfall.com
Discovery Channel http://discoveryschool.com
Johnny Can Spell http://www.nine-enterprises.com/
Math Website http://www.aplusmath.com
Math Facts http://www.edu4kids.com
Basic Math Skills by grade level http://www.aaamath.com/kids
Practice Cursive Writing-This one costs money http://www.jjmdesigns.com
Science http://enchantedlearning.com/Home.html
Fun for Kids http://yahooligans.com
Free Reading Incentive Program-Also lists books by level http://www.bookadventure.com
Flashcards http://www.studystack.com
Timed math tests http://www.oswego.org/ocsd-web
Free reading incentive program-Also lists books by level http://www.bookadventure.com
Online learning games http://www.gamequarium.com