After hearing about Tutpup on various message boards, I finally got around to signing up for an account. Tutpup provides competitive educational games, where students compete against other players. Students sign up under their teacher's account using a code, or sign up with their parents using an email address. Names are not shared and there is no way for players to communicate with one another. Only the teacher (or parent) has access to account information. Tutpup looks like a great way to motivate students to practise their math skills.