The Explore is done for this year, so next year he would be a "legal" 3rd grader, right? You could get the benefits from the test, using his chrono age if need be at that time. I would put off "skipping" until something forces the decision (which I realize may already exist, once you consider what might be affected).
I agree with this too. The benefit of homeschooling is you can go deep and wide, explore obscure topics, spend more time on extra curricular activities, etc. Unless my kids start asking to go to college early or back to school, we'll keep doing what we're doing. My son did the EXPLORE as a 4th grader this year. The work load he does is 4th grade, 5th at best. The materials he uses are 3-7 grade levels ahead.
