To truly master the material, process every chapter in three passes:

Print selected pages from the updated PDF (e.g., a 6-question set on electromagnetism). Give yourself 45 minutes – exactly like the DSE Paper 1A. Use the PDF’s marking scheme to self-assess. The "upd" version will contain level descriptors (e.g., “Award 1 mark for correct formula, 1 mark for substitution, 1 mark for final answer with unit”).

This section deals with nuclear physics.