Best Math Sites: http://www.kidsites.com/sites-edu/math.htm
Disco Dino Multiplication Practice: http://www.multiplication.com/games/play/disco-dino
Fun Brain: http://www.fun4thebrain.com
Math Playground: http://www.mathplayground.com/
Math Games: http://www.oswego.org/ocsd-web/games/Mathmagician/cathymath.html
Best Science Sites: http://www.kidsites.com/sites-edu/science.htm
National Geographics: http://kids.nationalgeographic.com/kids/ ;
http://ngexplorer.cengage.com/ngyoungexplorer/index.html
Online Books: http://www.storylineonline.net/
Books to Read Online: http://www.wegivebooks.org/books/search?search%5Bgenre%5D=Non-Fiction&[search][meta_sort]=created_at.desc
PBS Kids: http://pbskids.org/lions/
Read Books Online: http://storynory.com/
Reading Activities: http://www.bookadventure.com/Home.aspx
Spelling City: http://www.spellingcity.com/
Study Island: http://www.studyisland.com/web/index/
Extra Practice for Students (some worksheets are free or you can become a member) : http://www.superteacherworksheets.com/ ; http://edhelper.com/
Best Kid Websites: http://www.kidsites.com/
States of Matter: http://michellespecialeducation.blogspot.com/2012/01/states-of-matter-interactive-games-and.html