Look at these two pictures: a red stop sign from the side of a road, and a piece of honeycomb from a beehive.
How many straight sides can you count on the stop sign? Does every side look the same length? Now look at one cell in the honeycomb: how many straight sides does one cell have?
Give five seconds of quiet think-time before any hands go up, then take two or three answers for each picture. Do not confirm the counts yet — that is the work of the next step. Just let the class notice that many-sided shapes turn up in real life.
Here are three many-sided shapes on the board. As each one is shown, its sides light up and get numbered one by one all the way around.
Count along with the numbers. A pentagon has five sides. A hexagon has six. An octagon has eight. Watch how the last number round the shape is always its side count.
Reveal the sides one shape at a time. Before you tap the last shape's sides, ask the class to predict the count from the name.
Say each name slowly and let the class hear the ending.
In your maths copy, write the three words one under the other:
Walk the room glancing at the side counts (5, 6, 8) — no marking, this is whole-class copybook practice. Watch for pentagon and hexagon being swapped.
We count four shapes together on the board: one after another, ending with a shape turned onto its side.
One pupil comes up and taps each side to number it. The rest of the class counts out loud together as the numbers appear, and when the count is done we all say the shape's name.
This is a teacher-led display step on the board — one pupil taps the sides while the whole class counts aloud, then everyone names the shape.
Save the turned hexagon for last: it sits a different way from the first one, but counting proves it is still a hexagon. Hold out for the count before anyone names it. Revoice a good contribution: so it does not matter which way it is turned — six sides means hexagon.
Your turn now. Count the sides on each shape. There are four shapes, and the last one is turned a different way. Count every side, even when a shape is turned.
This is the practice round — pupils take turns at the board, check each answer, and the class confirms before moving on. Keep the board work brisk rather than over-explaining.
The turned hexagon is the one that catches people out — a pupil may think the count changed because the shape is facing a different way. Head that off: the number of sides never changes just because a shape is turned. Use the Check button as part of the narration — yes, six sides, that is it.
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