I was re-reading your earlier posts. Would the Explore really have more headroom than the MAP though? The Explore is an 8th grade test. After that you'd move to ACT and SAT but I don't know how useful those are for year to year as well as how does multiple testings affect college admissions. If the MAP does have up to 12th grade material, then it should be ok until about 8th grade I would think which is what I think Dottie was getting at in her posts. At that point, DC would taking ACT and SAT.