1. Dont waste time making notes; you have 5 weeks left and it will do more harm than good. Instead, focus on making productive use of your time.
2. Grab yourself a pack of highlighter pens; use each colour for a specific purpose. i.e. yellow for definitions, green for key concepts, pink for things you dont understand etc.
3. Pick a subject. e.g. Chemistry. Grab your text book, revision guide and specification. Start with chapter one of the text book. Read the material "actively" from chapter one of your text book, and highlight the key information as you go along.
4. When you have finished reading the chapter (I need to stress that you really need to read "actively"), careful go through the
highlighted parts only.
5. Attempt some of the end of chapter questions.
6. Grab your revision guide and do the same with the corresponding chapter.
7. Use the pomodoro technique to keep you focussed (it really works if you do it right).
https://tomato-timer.com/8. When chapter one is done, move on to chapter two and repeat the procedure.
9. Try to finish 3 chapters of Chemistry in a day.
Make sure you go to bed before midnight. Before you go to bed,
if you have any energy left, read over the highlighted parts in your text book + revision guide. Switch off the lights, be happy about how much you have done in a day, and go to sleep.
10. Wake up, change your subject, and repeat the process. Try to target 3 chapters a day, and alternate between different subjects.
11. After 10 days have passed, check how much work you have done per subject. If you are doing fine, thats great; you should be confident enough to continue with the strategy. If you are still behind, try not to worry about it too much but at the same time, try to speed up a little if you can. Its not the end of the world if you dont cover everything in time. You can still get As.
12. Two weeks before the exam, start attempting past papers and time yourself. Even if you dont have enough time to do past papers for all subjects, dont worry about it. But prioritise which subjects you really want to nail, and make sure you attempt past papers for those subjects.
I can remember getting an A in religious studies and I didnt attempt a single past paper. I got an A* in English literature and I didnt attempt any past papers for that subject either. The ones I did do past papers for, were subjects that I really wanted to nail, like the Sciences and Maths. So prioritise and get on with it.
I gave the above advice to my nephew who is sitting his GCSEs this year, and he thanked me for it. At first he was reluctant to use highlighter pens to highlight things in his text books because he has OCD. But he saw me doing it with my stuff, and it inspired him to use the strategy. The highlighting technique + Pomodoro technique is a great combination. I remember him finishing loads of chapters in 3-4 hours using the above.
Good luck.