thanks for the reply. yes that was quite the Freudian slip there between DH and DS

I think that we will sign him up for the ACT next January. He does extremely well on standardized tests, although as I noted in my PP I'm not sure it will be well enough in an area outside of math. I don't know what we'd put in a portfolio right now. I have various achievement tests that show him performing at above grade level but not a lot of "independent" work as his school is big on worksheets.
My son is almost 8 in 2nd grade. Academically he performs fine, but he is fairly miserable This year has not been a good fit with his current teacher who is very "old fashioned" and teaches in ways that are not engaging for him.
We received the usual ADHD survey of pre and post meds and while he is doing "better" after them there are still several major areas of challenge.
By "in grade" acceleration I mean not skipping a grade as he isn't ready for that socially, but letting him stay in his age appropriate grade while doing accelerated academic work. His school already allows him to proceed at his own pace for reading. We'd like to arrange for that for next year's math as well. Ideally we'd provide the work for him (everyday math curriculum isn't really but I have a feeling it will just be getting to go at his own pace.