You can program this site with your child's spelling words. The site helps them learn to spell the words through several types of games.
This site is wonderful for the beginning reader and fluent reader. Through games, stories, and short videos children will become stronger readers. Starfall
National Geographic for Kids http://www.nationalgeographic.com/kids/
Funbrain http://www.funbrain.com
African American Heros http://pbskids.org/aaworld/face_flash.html
History and Culture for Kids http://www.cr.nps.gov/kids.htm