A cube net is the flat fold-out template of a cube.
It has exactly six equally large squares, one per cube face.
Look at the template and imagine you fold it together.
If the six squares make a cube, check Yes.
If a side stays open or squares overlap, check No.
Tip: if four squares lie in a row with one in front and one behind, it almost always works.
Careful: if four squares make a 2×2 block, no cube can be folded.
Example
- Ja
- Nein
What does this exercise practice?
This task trains spatial imagination: children learn to fold a flat template in their minds and check whether a closed cube is formed. This is an important preparation for geometry in the higher grades.
Common pitfalls
Many children recognize the classic cross net quickly but struggle with unfamiliar arrangements. Rule of thumb: a 2x2 block of squares never folds into a cube, because two sides would fall onto each other.
How to practice at home
Cut out a cube net from paper and fold it together into a cube. Try different arrangements - which ones close up, which do not? That makes the idea easy to grasp.
Related: wuerfelzaehlen, Match dice, Shapes