Dr. Palmer is highly recommended and reasonably priced. I don't know where you are in OC, but the choices I usually hear are Pegasus, as someone already mentioned (VERY expensive) and the Ocean View GATE pull-out program which would be at Mesa View for his grade. It's supposed to be great and you can transfer from any district that doesn't have a self-contained GATE classroom as your home district has to release you for the reason "program not offered." Hope this helps.