When it comes to revising with other students of knowledge, what methodology/procedures do you recommend that we use in these study groups so that we all benefit each other and revise effectively in them

Set dates and do your best not to miss them, in the group let each of you make tasmīʿ while the other checks, put marks and underline important information in the book, and write your notes on it. You can also explain certain matters to each other and take turns doing so.