Scholastic Book Clubs Ordering http://www2.scholastic.com/browse/parentsHome.jsp
National Geographic for Kids http://www.nationalgeographic.com/kids/
Math http://www.aaamath.com
Multiplication Flash Cards http://www.aplusmath.com
Child Friendly Search Engine http://www.yahooligans.com
Science http://www.scienceclub.org
Variety of Topics and Grade Levels http://www.askforkids.com
http://www.classbrain.com
http://www.enchantedlearning.com