If this is a US public school, you may wish to read up on FERPA, including your school's annual notice to parents.

This recent thread or this post from a recent thread may provide the information you need.

The Iowa Test of Basic Skills (ITBS) is a grade-level test, not an above-grade-level test, therefore may not be the best means of determining readiness for acceleration. This Hoagies' webpage discusses What Do The Tests Tell Us?

Does your school website provide transparency regarding the qualification criteria which your school applies to the ITBS results to determine eligibility for accelerated learning? For example, does the school use a set cut score? ... a percentile, relative to other children in the grade?