Good morning!
I am trying to understand the difference between these tests for an 11-year-old taking Calculus at university(strong in school and competitive math). When tested four years back, the child's Reading Composite, Math composite, and Reading Comprehension(under Comprehension Composite) were all in the very high range, except the Letter and word recognition, which was in the high range. The child has picked up Math skills tremendously in the last four years since that is the only additional exposure the parents could give.
What test is recommended for such a child to get the best scores: KTEA-3 vs. WIAT-IV vs. WJ-IV Ach?