2026-W30
AD/AS and exchange-rate effects are the clearest weakness this week
Aggregate quiz data show strong performance on introductory concepts but repeated errors on AD/AS shifts, monetary policy and exchange-rate effects (Unit 3.2).
Published August 2, 2026
Average score
81.8%
Question accuracy (aggregate)
76.9%
Total attempts
33
Top weakness (unit)
Macroeconomics — Unit 3.2
Top strength (unit)
Introduction — Unit 1.1/1.2
1. Weekly Overview
Introductory topics held up well; macro policy and open-economy effects need focused revision.
Across 33 attempts from anonymized quizzes, students scored an average of ~82% but made concentrated mistakes on Unit 3.2 items about how monetary policy, tax changes and currency moves affect aggregate demand and supply. Basic concepts (PPC, opportunity cost, ceteris paribus) continue to show high mastery.
Student takeaway: Prioritize practice on AD/AS diagrams and open-economy policy scenarios (interest rates, taxation, appreciation/depreciation).
2. Key Patterns
Main Insights
Confusion about how monetary policy and interest-rate changes shift AD
The lowest accuracy item (33% correct) and long response times indicate many students struggle to link lower interest rates to AD movement and the channels (consumption, investment).
Advice: Practice drawing AD/AS diagrams showing a cut in interest rates; explain the demand channels (C, I, NX) in one sentence each and do 3 multiple-choice items that vary only the channel.
Exchange-rate effects on AD are frequently missed
A question about currency depreciation had 0% correct and other appreciation items show mixed answers, suggesting students mix up how depreciation/appreciation affect exports, imports and net exports.
Advice: Summarize in 2 lines what depreciation and appreciation do to NX, then apply that to AD shifts in two diagram exercises (one depreciation, one appreciation).
Foundational micro and intro economics concepts are strong
Several Introduction-to-Economics items reached near-perfect accuracy, showing reliable recall of core definitions and simple diagrams.
Advice: Use this strength: transfer clear definitions (e.g., opportunity cost, PPC, ceteris paribus) when answering multi-step macro questions to avoid confusion.
3. Revision Plan
Priority Areas
Monetary policy effects on AD · 3.2
Lowest correct rate and long solution times indicate conceptual gaps linking interest rates to C/I/NX channels.
Action: Draw AD/AS shifts for a rate cut; practice 5 questions where only the channel (C, I, NX) changes.
Exchange-rate movements and net exports · 3.2
Zero or very low correct rates on depreciation/appreciation items show confusion about open-economy transmission.
Action: Write short cause-effect chains (depreciation → price of exports/imports → NX → AD) and test with 3 diagram examples.
Fiscal changes (tax increases) — short-run effects · 3.2
Mixed answers on tax increase items suggest uncertainty about demand-side impact and multiplier intuition.
Action: Practice two examples: household tax rise and corporate tax rise — show AD shift and explain short-run output effect in one sentence.
AD/AS diagram practice distinguishing SRAS vs LRAS · 3.2
Some errors on capacity-expanding policy imply students conflate short-run and long-run shifts.
Action: Do 4 diagram tasks: temporary demand shocks vs permanent supply-side improvements (label SRAS and LRAS shifts).
4. Question Evidence
Featured Questions
Most Wrong Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| In the short run, what is the effect on aggregate demand when central banks significantly lower interest rates, making it cheaper for firms to borrow and invest in new machinery? | Macroeconomics | 3.2 | 12 | 33.3% | 66.7% | 2.7 min |
| What happens to aggregate demand if the domestic currency depreciates sharply against major trading partners’ currencies? | Macroeconomics | 3.2 | 4 | 0.0% | 100.0% | 7.1 s |
| If the government increases direct income taxes on households and firms, how is the economy likely to change in the short run? | Macroeconomics | 3.2 | 8 | 50.0% | 50.0% | 1.1 min |
Most Correct Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| What does a point inside the Production Possibilities Curve (PPC) indicate? | Introduction to Economics | 1.1 | 6 | 100.0% | 0.0% | 6.8 s |
| What does the concept of opportunity cost refer to? | Introduction to Economics | 1.1 | 5 | 100.0% | 0.0% | 4.7 s |
| What does the ceteris paribus assumption mean in economic models? | Introduction to Economics | 1.2 | 5 | 100.0% | 0.0% | 6.8 s |
Most Time Spent Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| How is short-run aggregate supply affected if the domestic currency appreciates, making imported raw materials and intermediate goods cheaper? | Macroeconomics | 3.2 | 4 | 100.0% | 0.0% | 14.8 min |
| Which of the following would cause a shift in the supply curve? | Microeconomics | 2.2 | 3 | 100.0% | 0.0% | 5.5 min |
| What happens if the domestic currency appreciates significantly, making imports cheaper and exports more expensive to foreigners? | Macroeconomics | 3.2 | 4 | 100.0% | 0.0% | 4.7 min |
5. Conclusion
Actionable next steps
Focus short weekly sessions on unit 3.2: draw AD/AS diagrams for monetary, fiscal and exchange-rate changes, and practice 8 targeted questions that distinguish demand vs supply and short-run vs long-run effects.
Note: This weekly report is automatically generated and may contain mistakes. Always double-check key points before using them for revision.
This report is based on anonymized aggregate quiz activity and highlights patterns across items; it does not include or imply any individual student data.