u/Dry-Cobbler3340

Hey everyone, im so worried for bio unit 4,5,6 im sitting them in may/june 26, does anyone have notes created based off of how the ms wants us to answer each concept and dives into each topic clearly because im finding the book useless and extremely confusing i mainly want notes for bio 5 and 6, also do i solve old spec papers or just new? because i did bio unit 4 in january and i didnt do as well as i thought i would even tho i was scoring A's and B's on the papers, also how the hell do you prepare for that article i still didnt go through it yet and i really dont know what to do! i self study everything btw so anything could help!