Elasticity Lesson Plan with Total Revenue

Use this 50 minutes lesson plan to teach price elasticity of demand through one concrete decision. Students calculate PED, classify demand, and recommend a price change using the total-revenue test. 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

A museum considers cutting admission from $20 to $16. Attendance is expected to rise from 500 to 700 visitors. Students must calculate PED and advise whether the price cut raises ticket revenue.

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 pairs four price-quantity cards: medicine, restaurant meals, gasoline after one day, and gasoline after one year.

Open the elasticity 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

• Museum quantity changes by 200/600 = 33.33 percent.
• Price changes by 4/18 = 22.22 percent in absolute value, so PED = 1.5 and demand is elastic.
• Ticket revenue rises from $10,000 to $11,200, so the forecast supports the price cut if other revenue and capacity are unchanged.
• Demand tends to become more elastic over time because consumers can find substitutes and change habits.

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 the museum recommendation with arithmetic, classification, and one stated limitation.

Most likely misconception: Students use percentage changes from different bases or assume every price cut lowers revenue.

Support and extension: Provide a midpoint organizer with numerator and denominator boxes. Extend by adding concession revenue per visitor and asking for the total revenue effect.

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.