Reading
http://4kids.org./games/
http://www.funbrain.com/
http://www.starfall.com/
http://pbskids.org/
http://www.scholastic.com/magicschoolbus/tour/tour.htm?space
http://www.tickettoread.com
Math
http://www.coolmath4kids.com/
http://www.kidsites.com/sites-edu/math.htm
Enjoy!