Notes are best for learning and recall, but exam preparation also needs questions. After each chapter, use topical past papers to practise the way Cambridge asks for calculations, explanations and definitions.

Prioritise weak chapters first. Read the summary, reproduce formulas and definitions from memory, then solve a short set of questions.
Use complete papers later for timing and paper-level revision.

A strong topic note should include the equations that belong to the chapter, define every symbol and show the correct units. A separate formula sheet can then be used for final recall.

Read the definition, hide it, reproduce it in your own writing, then compare the wording. Repeat it later through flashcards and shortanswer questions rather than rereading the same line.

Start in syllabus order when building the subject from scratch. During revision, it is usually better to focus first on the topics where your mistakes or school tests show the largest gaps.