That's what I thought as well, until I found this chart of all the subtests and composites: http://www.spedforms.com/erforms/preview.asp?test_name=Wechsler%20Individual%20Achievement%20Test%20-%20III%20(WIAT-3)&category=Achievement
I also learned of the difference between computer scoring and hand scoring, and that they don't always come out the same (although apparently it's not a statistically significant difference). Confusing.
Any advice on filling out this application is welcome! I also need to figure out who to ask for references. Do you think teachers are the best?