Prodigy

In Prodigy, an adaptive math-practice game set in a fantasy role-playing universe, students customize colorful, anime-style avatars and send them off to the Wizard Academy to prepare for battle. Students' characters travel the world; they chat with other wizards through a series of pre-written chat comments, challenge friends to fight in the arena, and brave multiple themed worlds to take on monsters and special bosses.

Wizard spells are powered by math problems. As students progress in their math skills, so do their characters, learning new spells to use against enemies. To use these spells successfully, students must flex their math knowledge and answer questions that cover a lot of content and adjust to students' abilities. If students don't succeed on the first try, they get hints to help them out. As they level up, they earn more spells and face more challenging monsters, earning gold they can use to purchase armor and items for their houses.

https://www.prodigygame.com/