Short example lesson — “Three-legged stool” (transfer-focused)

Goal: Students explain why three points define a plane and apply that to design.

1. Hook (concrete experience): show a 3-legged stool wobbling vs stable, and a 4-legged stool wobbling.
2. Diagnostic: quick poll — why does the 3-legged stool not wobble?
3. Task: In groups, design a yard stool that won’t wobble on uneven ground. Build a model (cardboard/wood) or simulate.
4. Reflection: groups record observations — what did they notice? What problems emerged?
5. Conceptualize: teacher guides discussion connecting observations to geometry (three non-collinear points define a plane) and to design constraints.
6. Transfer challenge: predict whether a 3-legged desk on rocky terrain would be stable; explain and defend.
7. Assessment: rubric checks reasoning (cause–effect), ability to apply concept in new scenario, and group reflection on learning strategies.
8. Metacognitive wrap-up: students write one strategy they used to remember the rule and one question they still have.

Please take the quiz to proceed: