It seems like a teacher's problem to me. Could you find out if he has any trouble with his math teacher?

My DS10 took middle school pre-algebra/algebra I class in last 2 years. He is still bored in there, and did a lot of doodlings, but he has maintained all A's. four things helped his transition to algebra: (1) a very funny series called "Life of Fred" featured a 5-yr-old genius boy; (2) participation in middle school math club; (3) "art of problem solving (AoPS)", an online community for all math kids, especially those who want to take the competitional math; (4) watch "vihart" video on youtube, very inspirational and entertaining.