OK...thanks Polarbear.

I'm a people-pleaser by nature, so my go-to reaction is to repair what I perceive to be a flawed relationship. Mulling this over with everyone is helping me get clarification on what I need. I think this is maybe a better plan than an unclear letter:

A thank you follow-up and request to meet with school psych to more thoroughly review ds' test results (since they were thrown at me without much explanation)...this to the teacher, school psych and principal.

An additonal email to teacher discussing ds' anxiety with Xtramath (and theory that this may be affecting his test performance) and more clear directions on how to begin the AR reading process (so ds can concretely demonstate his reading ability AND be challenged).

I worry about requesting more testing with school because of this testinng-anxiety issue. If we had unlimited funds, I would seek to have a achievement/IQ testing done outside of school, but that is not the case. I have a teacher-friend who has offered to administer an informal achievement test. Though this may help me to understand where he is...I'm sure the school would scoff at any amateur assessment.