I have a friend who was in a similar position with her son. She started by having him do Khan Academy online before school in the morning. He found it fun and it helped him stay engaged through what would have otherwise been mind numbing boredom. She found him teaching himself trigonometry in second grade - just for fun. She was able to generate printouts from the program whIch she brought to a local math tutoring center. She found someone there who was eager to work with him. It was exciting to work on advanced skills rather than with kids who were behind. Again fun for the kid and he was able to fill any holes from having taught himself high level material. Eventually the school district allowed radical exceleration but this tutoring partnership went on for years. HTH
