Thank you all for your response. His teacher did not recommend any particular scale.
She advised us to get gifted testing. She mentioned to check the type of tests since he is good at more visual than auditory. She asked to find suitable test which focus more visual than auditory.

I checked from couple of phys doctors, some are using WPPSI and some WJ III. But I do not know which WJ they are using.

Last edited by momfor2; 03/18/10 12:33 PM.