Dottie actually said her goodbyes here a few days ago - it's possible she'll pop up anyway, but I'll put my 2pworth in anyway in case it helps.
So I wonder, WPPSI can tell the real IQ of kid?? especially mathmatical gifted child??Shall I get him test again?
I feel the test result did not show his real ability.
He will be in grade 1 soon, I wonder even the GT class teacher won't understand his ability in math, I don't know what to do with my son, I feel like he will learning nothing in school about math.
I think that, since your son already has extraordinary achievement in maths and that's what you're concerned about, I'd focus on making sure that the school understands that. It's not obvious to me what an IQ test would add - it's less significant as a guide to what maths your DS needs than just looking at what maths he's doing now, for example.
(How is your DS's reading and writing etc. now? Are you thinking he's going to need acceleration in all subjects, or will it be best to leave him with age peers for most subjects but treat him differently in maths? I suppose you would want a current IQ test if the school was going to rely on the IOWA acceleration scale or something, so that might be an argument.)
Given how advanced he is I think you have to assume, yes, that even a GT teacher used to dealing with that age group may reasonably not feel confident to guide your DS's mathematics for long. (The discussion I just had with my DS7, starting with asking how he'd go about finding the cube root of 12167, just had him asking me how to do x^c where x and c are both complex numbers!) Of course you may strike lucky; DS had a teacher one year who was quite happy to organise his maths and did so very effectively.
You might want to look back at the threads I've posted about how we're dealing with this, as we're a couple of years down the line. It's easier now than it was when DS was that age, I have to admit, since it's only this year that he's had the maturity to get on with his own work effectively without needing input from his teacher. YMMV though. Good luck.
