Detectives, look at this mystery envelope. There are three riddle cards inside it, waiting for you to solve them.
Before we open them: a footprint is the flat shape a solid leaves when you press one of its faces in paint.
Riddle one: I have 3 straight sides. Riddle two: I roll anywhere and leave no footprint. Riddle three: I am the move that makes a shape face the other way.
Hands up, detectives: name us!
First job: look at the shape on the board and count its sides. Are all four sides the same? Then name the shape.
Next job: six small triangles can join to make one bigger shape. Name that bigger shape when you see it.
Last job: watch a real triangle card. It points up. After a half turn it points down. It is still the same triangle. That spin halfway round is a half turn.
A cube presses a square face and prints a square. A cylinder prints a circle. A sphere has no flat face, so it leaves no print.
Now we sort a mixed pile: flat shapes go to their name, solids go to the footprint they print.
Cards waiting: three flat shapes and three solids.
Say the home aloud before each card lands: Square, Triangle, Circle, Prints a square, Prints a circle, or No print.
Send each shape home
Watch the board first. Here is one model clue: I have 3 straight sides and 3 corners. What am I? That clue names a triangle.
In your maths copy, write one clue about your favourite shape for the class to guess. You can start with: I have …
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