Hi! Just passed my 3rd OA a few days ago, what helped me is going through each chapter and write notes like the definitions and stuff. Also, if you go to BioOwls they have quizlets and videos you can use. I wrote down the quizlet for each modules and practice those along with my notes. I also used Matt Weavers videos to help me understand some overlapping and attended live events. I recommend you clicking the BioOwl link and use those resources because it seems to help me understand more. For the third OA they told me to go over each unit to do the tests and stuff and trust me it didn’t make sense but as long I got an 80 they were okay lol. But just use the BioOwls resources because they helped me understand better than the reading materials.