Aggregate Demand and Supply Lesson Plan

Use this 55 minutes lesson plan to teach aggregate demand and aggregate supply through one concrete decision. Students diagnose an output gap, shift AD or SRAS, and trace short-run price-level and real-GDP effects. This is a complete one-period lesson, not an outline. The timing leaves room for a launch, teacher modeling, student work, discussion, and an individual check for understanding.

The classroom prompt

The economy begins at full employment. An oil-price spike raises firms' costs. Students show the short-run result, name the gap, and compare no-policy long-run adjustment with demand-management policy.

Put the question where every student can see it and do not supply vocabulary before students commit to an answer. Their first explanation becomes the evidence you use during the debrief.

Materials and setup

Give each group an AD-AS graph and shock cards: tax cut, oil-price spike, productivity gain, consumer pessimism, and government spending cut.

Open the AD-AS sandbox if you want students to test the same idea on an interactive model after the paper task. A projected version is enough; students do not need accounts for this lesson.

Run the lesson

Answer key and teacher moves

• An oil-price spike shifts SRAS left, raising the price level and lowering real GDP: stagflation.
• Output below Yf is a recessionary gap, even though the price level rose.
• Without policy, high unemployment puts downward pressure on nominal wages, shifting SRAS right over time toward Yf.
• Expansionary demand policy can restore output faster but raises the price level further, creating a policy tradeoff.

Do not give credit for the correct direction alone. Ask students to name the changed determinant, identify the curve or quantity that changes, and connect the change to the final outcome. A complete explanation contains a cause, a model move, and a result.

What to collect

Collect one correctly labeled graph plus a six-link adjustment or policy chain.

Most likely misconception: Students shift AD left because consumers dislike higher oil prices, missing the direct production-cost shock to SRAS.

Support and extension: Give each curve a fixed color and a shifter bank. Extend by asking which variable is indeterminate when AD and SRAS both increase.

A clean closing question

End with: What changed, what stayed fixed, and what evidence proves your conclusion? That sentence works as the final written check because it forces students to separate a cause from the movement it produces. Collect it, scan for the misconception above, and use the first three minutes of the next class to repair the pattern if needed.

This resource is ready to copy into a slide, handout, or LMS assignment. If you assign it for points, publish the success criteria before students begin: correct model, correct direction, and an explanation that links the two.