MathematicsGeometryAges 10–13

3-D shapes (age 10+)

Recognise, describe, and build simple 3-D shapes, including making nets

Lesson

Set out your lesson

Predict how a flat net can form a triangular prism, then test if materials allow.

Before teaching

Use this short check, then start teaching.

Activity

Comfort with the particular task and communication mode; optional oral/scribed work is recorded separately.

Policy

Check the learner can access these words/materials and prerequisite ideas; historical authorship is not readiness or mastery. If not, demonstrate briefly or revisit the named prerequisite.

Printer, credit, and teaching notes

Check the learner can access these words/materials and prerequisite ideas; historical authorship is not readiness or mastery. If not, demonstrate briefly or revisit the named prerequisite.

Use the supplied measured net. Paper, ruler and optional adult-supervised scissors/tape are needed for physical folding; no-printer route is to draw the stated lengths. Do not claim a fold if only viewing. No printer: view only the active learner card on screen, or an adult copies its exact prompts onto plain paper without answers. Oral pointing/dictation is an access option; record it as adapted/supported and do not claim handwriting from it. Keep adult keys/scripts separate; supply only the current stage.

Use the complete materials on screen or print only the current sheet. Keep adult guidance out of learner view.

Next: Show

Adult extras

Teaching limits and safe use

These are finite task opportunities, not proof of mastery. Record what was attempted and what support was used.

Physical folding and alternative-net identification remain conditional/partial. Supplied net is a new original diagram; browser/print dimensional fidelity is not yet tested.

Use fictional cases and invented identifiers; never record personal conflicts, health, bank details or family spending. Adult prompts/keys are private companion files, never learner links.

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Teaching approaches

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1 approach

Selected Default Gakuva

Predict how a flat net can form a triangular prism, then test if materials allow.

Family records and proof options

Keep a record of your learning

Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.

View learner plans ($12/mo per learner) See sample family archive

Learning resources

Extra practice links — they do not replace Gakuva’s teaching approach.

PhET Interactive Simulations · Practice link — not the full lesson

Area Builder

Open practice(new tab)

Before you open · source notes

Area Builder supports hands-on exploration for 3-D shapes (age 10+). Not every lab worksheet.

Free interactive page, no sign-in required for the tested path.

Before you open

Ask the learner what they changed in the sim or page and what they observed.

Opening this link does not save learning or assess mastery.

Source, access and review notes

Public PhET Interactive Simulations page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.

PhET Interactive Simulations. “Area Builder.” External page; Gakuva does not copy, host, embed, or redistribute materials.

Unknown — link only

Check understanding

Identify which net will fold into a given 3-D shape
Construct the net of a triangular prism and fold it to verify
Describe a 3-D shape by naming its faces, edges, and vertices

“If your child is given a flat cross-shaped piece of card (a net), can they predict what 3-D shape it will make when folded up — and then fold it to check?”

Curriculum record

Type: Procedural
Subject: Mathematics
Domain: Geometry
Age range: Ages 10–13

Standards

acara-v9:AC9M5SP01the-ontario-curriculum-mathematics-2020:ON-MATH-2020-G7-E1.1uk-nc-2013:Ma6/4.1b

Curriculum