Scottish Rite

Hi everyone,
My son has been approved for testing at Scottish Rite in Dallas. I know it will take several months to get an appointment and I am willing to wait. I was wondering if anyone has had their child Tested by Scottish Rite for dyslexia. My son just turned 6 and I was wondering if anyone knew what tests they use. Do they do an IQ test? I know their program is basically the same as the program he will receive in the school district that he attends. Can anyone give me any insight about what I can expect? Thanks in advance.
Debbie