DS5 has never been through either IQ or achievement testing, and because he is in a good school placement, I don't see any immediate need for testing strictly for purposes of advocacy or placement.
Wechsler Intelligence Scale for Children (WISC-III or WISC-IV, also read Changes from the WISC-III to the WISC-IV) ages 6-16
Seems like a good idea to wait for age 6. If money isn't an constraint, I would certainly go ahead, because you never know when the school will get a new teacher or a new principle or that 'sudden move' to a new state, etc. If you suspect that you child is DYS or near DYS then that alone is worth it, because we do find that many kids who are happy on September first of any given year are no longer challenged by February first - they can change so fast!
You may want to plan a family vacation around traveling to one of the few testers who is really experienced with PG kids.
Hopefully it will never be needed, but I'd sleep better at night.
Grinity
