The websites below are on the aproved AACPS list and provide interactive math activities for students from basic number recognition to more advanced math.
Coolmath: Tons of fun math games for children, explore this site to find out what peeks their interest.
Funbrain: Interactive online educational site with hundreds of free math games, books, and videos.
Math Playground: Math games for students on a variety of instructional levels. Use the games based on your child's developmental level and interests.
Number Rock: Rock out with your child to interactive math songs and videos.
Dreambok Learning (Free 90 trial available): Interactive math activities, that include the use of virtual manipulatives.