I did core last year and I'm redoing it this year as part of the separate sciences
My tip would be: More than 1 week b4 the exam, write notes(mind maps for me) for every subtopic eg. b1.1, b1.2 etc. I read from the text book and make notes.
Day b4, look through past papers and mark scheme to see how you should approach the questions.
Don't work past 5pm the day b4 the exam.
Any questions about biology, feel free to ask. Ill try my best to answer them. If i can't answer them, ask ur teacher.
I can tell you what I got from doing this last year (UMS):
80/80 Biology A* (Saved my overall GCSE grade)
72/80 Chemistry A*
72/80 Physics A*
66/80 Controlled Assessment A
Overall : A*
I'm going to do what I did last year this year. My Controlled assessment results were much better this year so there's less pressure. Good luck! Only 4 more days till the biology exam