personally i use voice note on my iphone to record every single school lecture there’s just some days i can’t pay attention or i’m too tired and sometimes i can’t take notes for 3 hours without my hand feeling like it’s gonna fall off and die instead in my notes i right the general topic  subject every few minutes and the time that correlates with it in my voice note recording this way when i need to go through my notes i can just immediately find the exact subject matter in the recording and listen to what the teacher said without having to write everything down all the time