I would at the very least get achievement testing done. Use one of the tests from the DYS list. Perhaps the school would be willing to do WJ-III or WIAT. I think it's very unlikely he would get accepted without a single required test.

Quite a few people on this board have their kids in DYS, me included. Most of the time people apply with both IQ and achievement test that are listed in DYS requirements.

Good luck

LMom