http://www.readingrockets.org
This is a site for families or teachers. Includes children's books and authors, strategies to help children who struggle with reading and/or school, and current articles about reading achievement.

http://nancykeane.com/rl
This site provides loads of book lists by genre, author, themes, etc.

http://www.funbrain.com
This site is designed for grades K-8 with math and language arts games.

http://www.kidsclick.org
This wonderful site is maintained by librarians for kids (too many topics to list).

http://wilearns.state.wi.us/apps/Default.asp?cid=572
Vocabulary Games

http://wilearns.state.wi.us/apps/Default.asp?cid=581
Ways Families can promote Vocabulary