www.abcya.com
www.starfall.com
www.weatherwhizkids.com
www.pbskids.org
www.youtube.com (School topics only, abuse of this policy will lead to you being prohibited from using this site.)
www.math.com
www.Iknowthat.com
www.enchantedlearning.com
www.kidsites.com (Educational only)
www.abcteach.com
www.nationalgeographic.com
www.multiplication.com
http://www.edutopia.org/blog/48-summer-websites-kids-teachers-keith-ferrell
(This site has a list of many possible sites to choose from)