Photo credit: Prodigy
Prodigy is a free math game that is based upon role-playing adventures where players go on quests. This game focuses on 1st to 8th grade math concepts. Players solve math problems to use spells to vanquish opponents.
Disclaimer: Early readers will need help with this game, and it takes some guidance for those who are not familiar with this type of game. This game also uses the theme of magic, and has players fight opponents.