I believe you are discussing the NWEA MAP test, which is in fact a computerized, grade-blind achievement test. The question bank for the MAP is the same for at least K-5, and possibly K-12. Look for the grade level where your child's score corresponds to the 90th percentile or more; remember that the average 3rd grader may not have fully mastered the 3rd grade curriculum. I will go look for the data table link now. You need to go far far down the document, like to page 50, and look at one of the appendices.