I was just reading the techinical manual for the computerized test that DD takes and thought you would find this interesting. It's not the same as the DRA but maybe you could borrow some of the wording. Although your post sounds fine.

"It's also helpful to compare multiple testing periods (ex. Fall & Winter, Fall & Spring) to watch for overall patterns of learning growth. Some very high ability students will remain in the “Exceeds” or "Advanced" category, but will experience “Low Growth.”

Low Growth for any student, regardless of Percentile Rank, is a red flag and needs to be addressed. EVERY child needs to experience growth, regardless of where he/she was at the beginning of the year. A high ability learner who needs intervention and receives it should also experience growth. Some educators believe that it is okay for high ability learners to stagnate at their current ability level while peers catch up. This is never okay and indicates a need to advocate for academic intervention on behalf of that student."