1 ✨ Spark
A dice, a brick and a ball are on the table. Which ones can roll, and why?
Think about this for a moment before you start.
2 🧊 3D Explore
Turn the scene, tap the objects and answer. Easy, Medium and Challenge are the three checkpoints.
➗ Shapes and patterns
…
3 📖 Explain
3D shapes have faces, edges and corners. A cube has 6 square faces, 12 edges and 8 corners. A cuboid has the same numbers, but its faces are rectangles.
A cylinder has 2 flat circle faces and a curved side, so it can roll and stand. A cone has 1 flat face and 1 corner at its tip. A sphere has no flat faces at all.
A pattern repeats in a fixed way. In a rangoli we can find the repeating part and say what comes next.
In a kitchen: a tea tin is a cylinder, a sugar cube is a cube, a funnel looks like a cone and a laddoo is a sphere.
✗ A cube and a cuboid are the same shape.
✓ Both have 6 faces, but all faces of a cube are equal squares; a cuboid has rectangles of different sizes.
📒 Glossary
- face
- a flat or curved surface of a shape
- edge
- where two faces meet
- corner (vertex)
- where edges meet at a point
4 ✍️ Practice
Play Medium and Challenge in the 3D scene. The bars show how many you got right the first time.
My mastery (right first time / played)
- Easy0 / 0
- Medium0 / 0
- Challenge0 / 0
5 🏡 Real-life task
Try this at home or at school, then check the suggested answer.
Scenario You need a box to pack a gift. Will you choose a cuboid or a sphere? Explain.
Show a suggested answer
A cuboid: its flat faces stack and stand, and corners fit together. A sphere would roll away.
Collect 6 objects at home. Sort them into cubes, cuboids, cylinders, cones and spheres. Then make a rangoli or bead pattern with a repeating part of three.
6 💭 Reflect
Think, then answer in your own words. Your notes stay on this device.
Observation In the 3D scene, turn the cube slowly. How many corners do you count, and how did you avoid counting one twice?
Show a suggested answer
8 corners: 4 on the top face and 4 on the bottom face. Counting top and bottom separately stops double counting.
Explain / create Create a rangoli pattern with a repeating part and ask a friend to continue it.
Show a suggested answer
Example: circle, triangle, triangle, circle, triangle, triangle… The repeating part is circle–triangle–triangle, so a circle comes next.