Footee is a site that is sponsored by what I think is a professional football (“soccer” in the United States) association in Great Britain.
It looks like an excellent tool for students — English Language Learners and younger native-English speakers — to reinforce academic skills in various subjects. Students register, choose the game they want to play, watch an animation teaching a particular math or English skill, and then play a soccer-related game where they have to answer questions.
Students register, and teachers can check on their progress online.
It obviously has a British flavor, but I think any student will enjoy and benefit from it — whether they’re a soccer (“football”) enthusiast or not!