So my DS4 is in the process for Early K.
If he doesn't move forward, he would be in his second year of PreK.

First step was an IQ. Don't know result but it was 1 SD higher as required to move toward the next step.

1. The next step was maybe the WJIII ACH assessment.
Here's an issue that came up that my DS4 said, this past weekend he asked something like 23-11 is what? I said lets get really good at adding first (he can currently add 23+11, 12+21 etc.), and we moved forward. But on his assessment on the Monday, when something with a minus came up, I'm guessing simple subtraction, he told the tester that he's not allowed to do minuses. He can do simple subtraction in his head. :\

How big of an issue will this be. He also had to write the math answers, and well writing is not as strong as his math and reading skills, which was also unfortunate. :|

2. on IAS I understand IV you get points based on IQ score.
I'm having trouble understanding section V and section VI scoring.

Section V & VI seems to be based on WJ III ACH.
Section VI gives him a score based on current grade level on different categories (vocab, Reading, Math, Language)

Section V seems to be percentile rank for above gradelevel on Language, Math, Reading, Science Reasoning.

How do these scores map from a WJ3 results since there are 11 subtest results?

(BTW, WJIII is actually outdated. The current version is the IV.)

WJ is a norm-referenced, individually-administered achievement test, whose best scores are age-based percentiles or other transformations of z scores. Grade-based normative scores are also appropriate for some situations. It is possible to report age and grade equivalents, but those are not generally recommended. (This does not stop institutions from using them for various high-stakes purposes, of course.) It does produce different composites for oral language, reading, written language, and mathematics, and has options for academic knowledge, which would include a little science.

In section V, the WJ is scored using grade norms, by selecting the grade to be entered (in this case, kindergarten), and then entering the resulting percentiles into the IAS.

In section VI, the WJ is scored using age, or using current grade (in this case, age 4), and the resulting percentiles entered.

With regard to the categories, one would legitimately be able to record scores for V: Language, Math, Reading, and VI: Vocabulary, Total Reading, Total Math, Total (Written) Language.

While his belief that he was not allowed to do subtraction undoubtedly lowered his math calculation score a little bit, if he is actually able to do subtraction, it's probably not a huge deal, as very little calculation skill is expected for children his age, so the age-norm-referenced scores would still be high if he did all of the addition. Writing is another issue, but again, these are age-normed scores, and few children his age have mastered handwriting. He's only being compared to other age-mates.