Start with clean labels
Every diagram should have a title, correctly labelled axes, curves, equilibrium points, and directional shifts where relevant. If the diagram is messy, the explanation becomes harder to follow.
Practise drawing core diagrams until they are fast and accurate: supply and demand, externalities, market failure, AD/AS, tariffs, quotas, subsidies, and exchange rates.
Explain the movement
After drawing, explain what changed and why. Do not assume the examiner will infer the economic story from the diagram alone.
Use the diagram to support chains of reasoning: cause, shift, new equilibrium, impact, and stakeholder consequence.
Evaluate beyond the diagram
Evaluation should discuss limitations, assumptions, short-run versus long-run effects, stakeholder conflict, and real-world context. The diagram starts the analysis, but evaluation wins the higher bands.