Rotation: Silent Starter → Objective → Exploration
Use this page on the projector (or students’ devices). It reveals prompts in sequence, runs a timer, assigns group roles, and collects an exit ticket.
Starter (5 minutes) — Observe first
Show one image. No talking. Students work in groups of 4.
- 0–1 min: Point to the image only. Let them look.
- 1–3 min: Reveal Q1–Q2 below. Walk and observe.
- 3–4 min: Reveal Q3. Point once at O.
- 4–5 min: Reveal banned words. Let groups refine answers.
Click “Assign Roles” for random roles.
In your group, write answers only:
- What stayed the same?
- What changed?
- What do you think point O is doing?
rotate • rotation • turn • angle
Today’s Goal & Success Criteria
Show after the starter. Keep it short and student-friendly.
Today’s Goal
Understand how a shape moves around a fixed point.
By the end, you should be able to:
- Describe what changes and what stays the same.
- Identify the fixed point (centre) of the movement.
- Predict where a point will move to.
- Explain the movement using diagrams and coordinates.
Exploration (Groups of 4) — Make the movement
Students rotate points and shapes first, then generalize. No formulas yet.
- Trace the shape on grid paper (or use a transparent sheet).
- Mark the fixed point O.
- Rotate the tracing half a turn around O.
- Draw the image and label it.
- Write: What stayed the same? What changed?
Use a grid (or Desmos). Plot the originals. Then plot the images after a 180° rotation about the origin. Students should infer the coordinate rule.
Try a quarter turn about the origin using a few points on a grid. Describe the pattern you notice. (Do not give the formula yet—just patterns.)
Exit Ticket (Individual)
Students prove understanding without relying on the keyword.
Use your rule from exploration to check the predicted image.