I struggled with this with both my kids (11th grade but first time doing this type of history) and 7th grade (also first time) and have been allowing them to use notes BUT they have to try the whole exam without notes first, then they can use notes to finish up. I’m trying to also teach them to study since they would need that skill if they decide to go to college/university so the last time, I did subtract some points from my 11th grader on the questions for which he needed his notes since I knew he did NOT take the time to study before the exam.
For this lesson (7 in American), we have started to discuss the exam questions after each video/notes session so that my kids are learning how to process information for retention. It really seemed like it was going in one ear and out the other. It for sure is more work and involvement for me but, gratefully, I have the time to do it.