2D Shapes and 3D Objects
Warm-up
Pass around a mystery bag with 3D objects inside. Students reach in, feel one object, describe what they feel ('it's smooth, it has flat sides, it has corners'), and predict what it looks like before pulling it out.
Explore
'Shape walk' around the classroom or school. Students find shapes in the environment and record them (draw or photograph). Encourage 3D objects: 'The door is like a rectangle. The waste basket is like a cylinder.' Share findings as a class.
Consolidate
Practice
Students choose a 3D object and use clay or playdough to build a model. They describe it to a partner using attribute language. Exit: teacher holds up a shape card — students say one thing they notice about it.
Exit reflection
Yes — colour is a valid attribute for sorting! Celebrate it, then ask: 'Can you sort them a different way, using something about the shape itself?' This extends without invalidating.
'That's an interesting observation — what do you notice about the sides?' Guide them to see that a rectangle has two pairs of equal sides (long and short), while a square has four equal sides. The student's observation was mathematically perceptive.