Starfall.com-  This is a great website for second grade readers!

http://www.learningbox.com/base10/BaseTen.html - Fun site for making numbers using base ten blocks

http://www.hbschool.com/activity/counting_money/- This is a great website for counting coins!

http://www.sowashco.k12.mn.us/virtualmedia/elementary/math/k-1math.htm- LOTS of Math games and activities for gr. K-1

http://www.sowashco.k12.mn.us/virtualmedia/elementary/math/2-3math.htm- LOTS of Math games and activities for gr. 2-3

Aplusmath.com- Good site for practicing basic math facts.