Thank you for your reply.
I didn’t take my boy to any IQ test since I am not sure how much the test will help even his score could be over 130. My boy took CoGAT last Oct but unfortunately the report doesn’t show the score but percentile and here is the result
Grade percentile ranking
Verbal 97
Quantitative 99
Nonverbal 98
Composite (V+Q+N) 99
Profile : 9A
Thank you for someone just posted the 2012 Spring data, I found my boy is not particularly outstanding and actually he doesn’t improve much over the year except Math since he is taking 4th grade math.
His RIT scores will equal to 3rd grade (94 percentile) for Language and Reading and 4th grade (96 percentile) for Math.
I am talking to the school and see whether they will let my boy skip a grade. Now probably I will hold on to it and see whether he can get into the gifted class next year.