A piano lesson evaluation is a summary of a piano student's accomplishments throughout the school year. It encourages piano teachers to evaluate the progress of each student and their strengths and weaknesses. One homeschool evaluator told me she loved the piano lesson summaries because they explained the musical concepts that the students had covered, which enabled her to write a more accurate description of the student's musical achievements in their evaluation.
This idea was inspired by my own piano lesson evaluation from my high school piano instructor. In my sophomore year in high school, my piano instructor wrote a summary of what I had accomplished in my music lessons that year for my PHAA evaluator. It was such a blessing, and I still treasure my piano teacher's summary.