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.
 www.funbrain.com

Math Playground:  Math games for students on a variety of instructional levels. Use the games based on your child's developmental level and interests.
 www.mathplayground.com

Number Rock:  Rock out with your child to interactive math songs and videos.
 www.numberrock.com

Dreambok Learning (Free 90 trial available):  Interactive math activities, that include the use of virtual manipulatives.  

https://www.dreambox.com/teachertools