Is your teen mixing it up
Another reason your teen might be struggling is because they have no variation in their Study Formula.
I would go bonkers if all I did to study for exams was read and make study notes.
Doing these things is a crucial part of my Study Formula, but if thats all I did, my motivation to study would sink because it would be such a monotonous process.
Its really important to try and incorporate different things into your Study Formula.