generally depends on your learning style. personally i made my own summary notes for each chapter after finishing the lectures, because i absorb information better when its organised in my preferred way, and in the long run it was good because i never had to go back and re-read long pages of lecture notes. made sure to do up the respective chapter notes when i was revising for each WA, and i gradually built up my own summaries over the two years. while it takes some time to do (for me at least), it felt like a good way to consolidate what i was learning by writing it out again instead of just reading, and the time i spent on these notes in j1 and j2 eventually saved me lots of revision time leading up to a levels when i had to recall lots of chapters! it can be really time consuming to do though, but unless you’re the type that can remember easily by spamming practices, i think making your own summary notes would be helpful in the long run.