Individually-administered achievement testing like the WJ, WIAT, or KTEA is typically age-normed, though one also has the option of grade norms. The standard score and percentile information gives you a good idea of relative standing in the population, which can be helpful for use in the IAS. There is a temptation to use the grade equivalents as direct justification for grade placement. Don't do it. That's not what they mean, nor what they are designed for. These are the kind of test you do need for DYS.
The Terra Novas are good for looking at grade-level standards, but not as informative beyond learning standards one grade level above, or so.
