Flat vs Solid Shapes
Distinguish two-dimensional (flat) shapes from three-dimensional (solid) shapes
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1858 concepts · 9 subjects
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Flat vs Solid Shapes means practising the idea at the table with counters or paper models and one clear check. We will demo once, then your child tries.
Materials: Paper shapes or a ruler and pencil; Shape name cards. Adult traces or shows one shape and names a property (sides/angles). Child identifies three shapes or measures one simple property and records it. Done: three correct shape/property responses. Stop after the fresh check; keep optional challenge for another day.
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PhET Interactive Simulations · Practice link — not the full lesson
Area Builder
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Area Builder supports hands-on exploration for Flat vs Solid Shapes. Not every lab worksheet.
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Before you openAsk the learner what they changed in the sim or page and what they observed.
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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.
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Check understanding
- Sort shapes into 'flat' and 'solid' groups
- Explain that a circle is flat but a sphere is solid
- Identify whether a given shape is 2-D or 3-D
“Does your child understand the difference between a flat shape like a square and a solid shape like a cube — and can they sort everyday objects into flat or solid?”
Curriculum record
- Type
- Conceptual
- Subject
- Mathematics
- Domain
- Geometry
- Age range
- Ages 5–7
Standards