I'm in a very similar situation as you with your DS. My DS has very similar scores. I found using my WJ achievement scores with the administration effective in getting additional enrichment. They couldn't argue with his scores. In our particular case, my son needed enrichment in math. DS (1st grade) scored in the >99.9% in several of the math portions of the WJ test, but did not get to that 97% or 98% on the IQ test. He does not qualify for gifted services, but clearly needs more. The kids does double digit multiplication and the first grade curriculm ends with learning addition and subtraction facts 1-20.
I met with my principal and they placed him in a special math program that kids at our school begin in 3rd grade and/or if they need additional tutoring. The program is modular based so he works through levels until he "passes". For the moment, it is working for DS (he working 3 grade levels up).
I'm not sure if my DS is "gifted" or not. I do know that he is way beyond grade level and needed more. Is it perfect, no, but it is better than nothing. I also felt like I had to fight like heck to get this small service.
I would encourage you to speak to your administration to see if your school has a similar program in your child's area of strength that he could participate in. The worst they can say is no and be prepared not to take their first answer. My DS is much happier with his school day now that he is in the program.
I wish you luck.
