I'm not sure if this applies to the KTEA or just other achievement test, but my understanding is that when you see a "grade equavalence" what is means is:
Your child in 2nd grade, scored as well as an average child in 8th grade did if that 8th grader had been given this 2nd grade test.
So it means that the child's needs aren't being met by giving 2nd material, but it doesn't mean that the child is ready for 8th grade level material. YWIM?
I do agree that there is a serious need for achievement tests that give specific information about placement, and also tells where the gaps actually are. The alternative is to give every end of year test in every subject until one reaches a grade level where the child finds material that they need to learn. Of course there must be some balance between these two extreames, yes?
Love and More Love,
Trinity