This is kind of a weird aside, but I attended many of my kids' music lessons. The teacher would ask them to play a selection, and then stop them after the first few measures, to work on some point of technique or interpretation. It meant that they never got to the end of anything, until the recital.

"Measure position" had a strong impact on review.

I realized that perfecting the entire selection isn't the point. Instead, the point is for the student to learn how to critique themselves, and improve their practicing.