Decide what matters most before you revise
Make a three-column list before you start revising:
- Must secure: topics that come up often, carry lots of marks, or are needed to answer other questions.
- Worth improving: topics where one focused session could move you from confused to workable.
- Leave for later: topics that are low-value, unlikely to appear, or too big to fix before the next exam.
Use your specification, class topic list, teacher feedback, mock-paper mistakes and your own exam board or awarding-body materials. If you do not know which board or specification you are doing, ask your teacher before using random online resources.
A good rule is: revise the topic that gives you the best mix of marks, confidence and realism. That is more useful than spending a whole evening on a topic just because it feels urgent.