seegongsik
Grade 1 (age 6-7)

grade 1 3D Shapes

The things around us come in many solid shapes: flat boxes, round balls, tall cylinders, and pointy cones. A box has flat faces, so it stacks up neatly, while a ball is round on every side and rolls anywhere. Think of dice, a soccer ball, or a can. Pick each shape and see which ones roll and which ones stack.

Shapes around us

👀 Find the shapes
①Things around us come in many shapes
②There are box shapes, can shapes, ball shapes, and party-hat shapes
③Some roll and some stack well, depending on the shape

Looking at shapes

Box shape
🔍 Box shape
①A box shape has flat faces all around
②Dice, bricks, and boxes have this shape
③It stacks well but does not roll
④It has 6 flat faces

Alike and different

🤔 Rolling and stacking
①Ball shapes and can shapes roll well
②Box shapes stack well
③A ball shape rolls in any direction
④A can shape rolls on its side and stacks standing up

Wrap-up

Box shape
box = 6 flat faces
It stacks well but doesn't roll
Can shape
can = curved face + flat faces
It rolls in one direction
Ball shape & party-hat shape
ball = all curved / party hat = pointed top
A ball rolls any way; a party-hat shape can stand on its flat bottom
🎯 Remember
①The solid shapes here are box, can, ball, and party-hat shapes
②A shape with flat faces can be stacked
③A shape with a curved face can roll
④Looking at a shape tells you whether it is better for stacking or rolling

Examples and unit check

Example 1
What shape is a soccer ball, and why does it roll so well?
1
A soccer ball looks round from every side, so it is a ball shape.
2
It has no flat faces, so it rolls in any direction.
▸ A ball shape (it rolls in any direction)
A shape with only a curved face and no flat faces rolls well.
Example 2
Which shape stacks well and does not roll, and why?
1
To stack things, you need flat faces.
2
A box shape is made of 6 flat faces, so it stacks well and does not roll.
▸ A box shape (6 flat faces)
Flat faces are good for stacking, and curved faces are good for rolling.
Unit check
Which of these is a ball shape?
①a die
②a drink can
③a marble
④a brick
▸ ③ a marble
1
A ball shape is round from every side and has no flat faces.
2
The die and the brick are box shapes, the soda can is a can shape, and the marble is a ball shape.
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2D Shapes

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