Effective Economics revision starts with what you actually get wrong, inside the scope of your syllabus for your exam year. Re-reading feels busy, but a mistake log tells you where your marks are leaking and gives you something specific to fix.
What does a mistake log look like?
A mistake log is a simple table you add to after every practice question. The mistake log and retest queue keeps it on your own device, groups entries by the kind of error, and queues a fresh question for later.
| Question | What I wrote | Type of error | What I should do | Retest on |
|---|---|---|---|---|
| Price of a substitute rises: show the effect on demand | Drew a movement along the curve | Interpretation | Ask “did a non-price factor change?” | Next Sunday |
| Price 50 to 45, quantity 200 to 230, find PED | Used 45 as the base for price | Calculation | Use the same base for both changes | Next Sunday |
| Explain why a tax may reduce output | Stopped after one step | Incomplete reasoning | Add the link from cost to supply | In 10 days |
Notice that the log records the type of error. Three types cover most Economics marks that go missing: arithmetic slips, misreading what was asked (interpretation), and reasoning that stops early.
How do you revise each kind of skill?
Diagrams. Draw the diagram from a blank page, label both axes, and state what each curve shows. Then change one factor and redraw. Check against your notes only after you have tried.
Calculations. Redo the exact question you missed, then a fresh one with different numbers. Elasticity, percentage change and revenue questions are easier to fix with two or three repeats. The percentage-base explorer shows the base at each stage, which helps you see where a slip happens.
Written answers. Write a short explanation, then check whether every link in your chain is stated: cause, effect on the curve, effect on price or quantity, and conclusion. Ask whether an assumption is hiding. The data responses module practises this with evidence.
How should you use the last weeks?
Work in three passes.
- Scope pass. Confirm the syllabus for your exam year. Strike topics that are outside it. The guide to using the correct pre-2027 and 2027 resources shows what to confirm about the syllabus version.
- Gap pass. Rate each topic secure, shaky or new, using your log. Give shaky and new topics the most time.
- Retest pass. Return to the log every few days. A topic counts as repaired only when you get a fresh question right on a different day.
Use the realistic revision planner to fit this into your weeks without hiding an overload.
Worked example: turning a wrong answer into a plan
Here is an original question: Demand for a fictional brand of sports shoes rises. Explain the effect on the equilibrium price.
A student writes: “Price rises, so demand falls back.” The log entry reads: Type: reasoning is out of order and confuses cause and effect. Repair: state the chain in sequence.
The corrected chain reads as follows.
a change in tastes shifts the demand curve to the right. At the old price there is now a shortage.
Price rises, which makes suppliers extend supply along the supply curve. A new, higher equilibrium price is reached.
Notice that the higher price is the result, not a new shift of demand. The student then writes one fresh question of the same type, answers it a week later, and ticks the log only if the chain is complete.
When is self-revision enough?
Self-revision is enough when your mistakes are mixed and fading. Something more is needed when the same mistake keeps appearing across weeks, or when you cannot explain why your answer lost marks. The help pages on curve shifts and percentage bases deal with the two most common repeats.
Next steps
Check your study route for order and use the original practice hub for questions. If you would like a teacher to read your log and answers with you, online one-to-one Economics tuition begins with a paid one-hour trial at the assigned teacher’s confirmed rate, starting from RM80.