Blog · 6 min read
Teaching shapes and solids with magnetic tiles
The reason teachers reach for these is not the building. It is that a net folding into a solid is abstract on paper and obvious in the hand.
Why the folding matters
A net is a flat arrangement that becomes a three-dimensional shape. On a worksheet it is a diagram a child either sees or does not. With tiles, the child lays out six squares in a cross, lifts the edges and watches a cube appear — and the relationship between flat and solid stops being something to be told and becomes something they did.
This is the one activity that justifies buying tiles for a classroom on its own, and it is worth doing at home too, well before it appears in any curriculum.
A progression by age
| Age | What to do |
|---|---|
| 3–4 | Name and sort shapes. Match by shape, then by colour. Make a flat mosaic. |
| 4–5 | Build the cube from six squares. Count faces. Find shapes around the house. |
| 5–6 | Pyramids and prisms. Which shapes tile a floor with no gaps? |
| 6–7 | Count faces, edges and vertices. Tabulate several solids and look for the pattern. |
| 7–9 | Angles, symmetry, and why a triangle is rigid where a square is not. |
The activities that work best
- Predict then fold. Lay out a net, ask what it will make, then lift it. Being wrong is the good part.
- Find the eleven nets. There are eleven distinct nets that fold into a cube. Older children will spend an afternoon hunting for them.
- Faces, edges, vertices. Build four solids, count each, write the numbers down. The relationship between them emerges from the table without being announced.
- Tessellation. Try to cover a floor area with squares, then triangles, then pentagons. Pentagons fail, and discovering why is more useful than being told.
- Rigidity test. Build a square and push it sideways; it collapses. Add a diagonal; it does not. That is the whole of structural bracing in ten seconds.
What you need to own
Squares and equilateral triangles cover everything up to about six. Beyond that the interesting work needs pentagons, hexagons and isosceles triangles, which is where a dedicated educational assortment stops being a luxury — a dodecahedron needs twelve pentagons and no substitute exists.
For a classroom, plan roughly thirty pieces per pair of children working together, and store them sorted by shape so a lesson does not begin with a search.
Keeping it play rather than school
Set the problem and then stop talking. A child who is asked which shapes make a dome will test six wrong answers and remember the right one; a child who is told will remember neither. The STEM guide goes into what the research does and does not support here.
Looking at sets?
Every series is compared in the catalogue, with ages, typical piece counts and what each one is genuinely for.
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