I am not sure how dys looks at just IQ and a portfolio. We did achievement at the same time and I would say it was helpful. I realized that DD needs to be challanged more in math, and that even with our working on a 3rd grade level in homeschool while she should be in K, she needs more. I guess deep down I knew this as she never struggles or has to work at it and it seems easy for her, but the achievement testing pointed it out for us and made us reevaluated what we are doing. The tester we used has tested for DYS a lot and is a professor at a college so she was fairly inexpensive for both. I am not sure if I would have done the testing solely for DYS though if it had been expensive but I am glad I have the results.
