My DD9 did the Noetic Math Learning contest last year. It was sponsored by a local afterschool math academy, which she was not involved in. She missed only 1 question and was excited to get an award because she hadn't been expecting to win anything. This year she did another locally-organized contest through the same group. She's enjoyed it. And she was mad that I didn't sign her up in time to get a seat for the Noetic contest, but it filled up before I remembered it.