Math Chimp is a catalog of mathematics games and activities that I initially wrote about last fall. At that time they only listed resources for elementary school. Now they have expanded to cover activities and games for middle school mathematics students. While Math Chimp is far from being a revolutionary mathematics resource, the catalog is handy for teachers looking for materials that their students can use independently. Teachers can find games on Math Chimp by selecting the grade that they teach then selecting a standard or objective. After you make those selections Math Chimp will direct you to an appropriate mathematics game for your students.

On a related note, one of the sponsors of Free Technology for Teachers, ABCYa offers great elementary school mathematics games that can be played online and on an iPad.