XP Math is a good place to find online math games for students in elementary school and middle school. The games section of XP Math offers games for basic arithmetic, algebra, geometry, and probability. There is a classroom option that lets you create an account on XP Math and you can keep track of your students' game scores.
Applications for Education
XP Math is a good resource for locating mathematics activities that students can use on their own. The games section allows students to record their scores to measure their progress.