Use existing rangkuman as a checklist. For each bullet point, ask: "Can I explain this in 3 sentences to a friend?" If no, go back to textbook.
Read full textbooks (Campbell 11th/12th ed. + Solomon/Mader for physiology). Create your own rangkuman while reading.
Do instead:
Buku "OSN Biology Super Module" by Penerbit Yrama Widya (check for 2022+ edition) – includes summaries + 500+ OSN-style questions. Final advice: Rangkuman materi OSN Biologi is like a map – it shows you the terrain, but you still need to walk the path yourself by solving problems and understanding mechanisms. Selamat belajar!
