TONS of great phonics games, letter recognition/sounds, and printable pages to use at home!
http://www.starfall.com
 
Fun numeral recognition and counting games.  You may have to click on the
early childhood link in the top right hand corner.
http://media.emgames.com/emgames/demosite/demolevel1.html
National Geographic for Kids
http://www.nationalgeographic.com/kids/

Scholastic Reading
http://www.scholastic.com

Math Games
www.abc.net.au/countusin/default.htm
PBS Website
http://www.pbs.com
 
Language Literacy
http://www.abc.net.au/countusin/games/game4.htm