Mangahigh offers free math games for Kindergarten through Grade 12 students. To use the games with your students, you’ll need to register your school, but that only takes a couple of minutes. Games are related to the core standards and “are designed to dynamically adapt in difficulty to the ability of the student . . . “ Games are downloaded to school computers, which usually takes three to four minutes. To use the games, school computers must have Adobe Flash Player 10 installed. You can take a look at short versions of some of the games before registering.