Economics · Grade 12

Active learning ideas

Aggregate Supply (AS)

Active learning helps students grasp aggregate supply because the concepts of sticky wages and potential GDP are abstract. Moving from theory to graphing and debates makes these ideas concrete and memorable. Research shows that kinesthetic and collaborative activities deepen understanding of supply-side economics more than lectures alone.

• Ontario Curriculum Expectations
• CEE.EE.15.3
• CEE.EE.15.4

• 20–40 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Flipped Classroom
• 20 min · Pairs

Pairs Graphing: SRAS and LRAS Curves

Partners sketch AD-AS models side by side, labeling SRAS as upward sloping and LRAS as vertical at potential GDP. One partner dictates assumptions like sticky wages, the other draws and explains. Switch roles after 10 minutes and compare graphs.

Differentiate between the short-run and long-run aggregate supply curves.

Facilitation Tip

During the Pairs Graphing exercise, circulate and ask each pair to explain their reasoning for the slope of SRAS before they move to LRAS, reinforcing the sticky wage concept.

What to look for

Present students with a scenario: 'The price of crude oil, a major input for transportation and manufacturing, increases significantly.' Ask them to draw the effect on the SRAS curve and explain in one sentence why the curve shifts in that direction.

• Understand
• Apply
• Analyze
• Self-Management
• Self-Awareness

Activity 02

• Flipped Classroom
• 30 min · Small Groups

Small Groups: Shift Scenario Cards

Distribute cards with events like rising oil prices or productivity gains. Groups predict and graph the SRAS or LRAS shift, justify with curriculum factors, and present one to the class. Circulate to probe reasoning.

Analyze how changes in resource prices affect short-run aggregate supply.

Facilitation Tip

During the Small Groups Shift Scenario Cards activity, provide one scenario per group and have them first predict the shift before consulting their notes or textbooks to verify.

What to look for

Pose the question: 'If the government implements a new policy to improve worker training and education, which aggregate supply curve (SRAS or LRAS) would be primarily affected, and how? Justify your answer by referencing the factors that shift each curve.'

• Understand
• Apply
• Analyze
• Self-Management
• Self-Awareness

Activity 03

• Flipped Classroom
• 40 min · Whole Class

Whole Class: Potential GDP Debate

Pose scenarios like a labor strike or tech boom. Class votes on output effects, then graphs collective AD-AS model on board. Discuss full employment implications using Ontario economic data.

Explain the concept of full employment output (potential GDP).

Facilitation Tip

During the Whole Class Potential GDP Debate, assign roles such as 'pro-inflation,' 'pro-unemployment,' and 'neutral economist' to ensure balanced participation and deeper critical thinking.

What to look for

Students receive two cards: one labeled 'SRAS' and one labeled 'LRAS'. Ask them to write one factor that shifts their assigned curve and one consequence of that shift on real GDP or the price level.

• Understand
• Apply
• Analyze
• Self-Management
• Self-Awareness

Activity 04

• Flipped Classroom
• 25 min · Individual

Individual: Data Plotting Exercise

Students access Statistics Canada GDP data, plot actual vs potential output, and identify recessionary gaps. Note factors causing deviations and suggest policy responses in a short reflection.

Differentiate between the short-run and long-run aggregate supply curves.

What to look for

Present students with a scenario: 'The price of crude oil, a major input for transportation and manufacturing, increases significantly.' Ask them to draw the effect on the SRAS curve and explain in one sentence why the curve shifts in that direction.

• Understand
• Apply
• Analyze
• Self-Management
• Self-Awareness

A few notes on teaching this unit

Teachers should avoid presenting AS as a static concept by only showing pre-drawn graphs. Instead, build the curves collaboratively, starting with real-world examples like oil price shocks or education policy changes. Research suggests that students retain AS concepts better when they physically manipulate graphs and discuss trade-offs in small groups rather than listening to a lecture about them.

By the end of these activities, students will accurately draw and label SRAS and LRAS curves, identify real-world events that shift each curve, and explain why the LRAS is vertical while SRAS slopes upward. They will also distinguish between short-run adjustments and long-run sustainable output.

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Watch Out for These Misconceptions

• During Pairs Graphing: SRAS and LRAS Curves, some students may assume the SRAS curve is vertical like LRAS at all times.

  During Pairs Graphing: SRAS and LRAS Curves, circulate and ask students to explain why their SRAS slopes upward. If they hesitate, prompt them with: 'What happens to wages when prices rise suddenly? Why can’t firms adjust immediately?' Use their answers to guide them back to the sticky wage explanation.

• During Small Groups: Shift Scenario Cards, students might believe potential GDP is the economy's absolute maximum output possible.

  During Small Groups: Shift Scenario Cards, provide a scenario that shows an economy operating above potential GDP (e.g., unemployment below 4%). Ask groups to graph the short-run effect and discuss why this leads to inflation, redirecting them to the definition of sustainable output.

• During Whole Class: Potential GDP Debate, students may think resource price changes shift LRAS immediately.

  During Whole Class: Potential GDP Debate, introduce a scenario card about a sudden drop in oil prices. Ask groups to debate whether this shifts SRAS, LRAS, or both. Use their discussion to highlight that LRAS shifts only with long-term supply-side changes like technology, not short-term input costs.

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Methods used in this brief

• Flipped Classroom