Describing Properties of 3D Solids (Faces, Edges, Vertices)

Active learning works well for this topic because young children learn best by touching, moving, and comparing real objects. Handling 3D solids helps students connect abstract terms like ‘edge’ and ‘vertex’ to the shapes they can see and feel.

• Year 1
• Mathematics
• 4 activities
• 25 min–40 min

Learning Objectives

1. Identify the faces, edges, and vertices on various 3D solids.
2. Compare and contrast the movement properties of different 3D solids, such as rolling versus stacking.
3. Explain the defining characteristics of a pyramid using its faces, edges, and vertices.
4. Classify 3D solids based on their observable properties like flatness or roundness.

Stations Rotation

⏱ 35 min·Small Groups

Exploration Stations: Shape Properties

Prepare stations with 3D solids: one for rolling or stacking tests, one for counting faces and edges, one for vertex hunts. Small groups rotate every 7 minutes, sketch findings, and share one description per shape. Conclude with whole-class show-and-tell.

Prepare & details

Differentiate between a face, an edge, and a vertex on a 3D shape.

Facilitation Tip: During Exploration Stations, place one basket per solid type so students can focus on one shape at a time before moving on.

Setup: Tables/desks arranged in 4-6 distinct stations around room

Materials: Station instruction cards, Different materials per station, Rotation timer

• Remember
• Understand
• Apply
• Analyze
• Self-Management
• Relationship Skills

Stations Rotation

⏱ 25 min·Pairs

Shape Hunt: Real-World Solids

Give pairs checklists of properties like 'rolls easily' or 'has 6 faces.' Students hunt classroom objects, describe matches, and vote on best examples. Display photos with labels for review.

Prepare & details

Explain how a cube is different from a cylinder in how it moves.

Facilitation Tip: In the Shape Hunt, give each pair a small whiteboard to record what they find and sketch the objects they locate.

Setup: Tables/desks arranged in 4-6 distinct stations around room

Materials: Station instruction cards, Different materials per station, Rotation timer

• Remember
• Understand
• Apply
• Analyze
• Self-Management
• Relationship Skills

Stations Rotation

⏱ 40 min·Small Groups

Build and Describe: Multi-Link Solids

In small groups, provide linking cubes for building cubes, pyramids, and cuboids. Count and label faces, edges, vertices on group posters. Pairs then compare builds and explain differences.

Prepare & details

Construct a description of a pyramid using its properties.

Facilitation Tip: When building with Multi-Link cubes, ask students to count faces, edges, and vertices aloud before adding new blocks.

Setup: Tables/desks arranged in 4-6 distinct stations around room

Materials: Station instruction cards, Different materials per station, Rotation timer

• Remember
• Understand
• Apply
• Analyze
• Self-Management
• Relationship Skills

Stations Rotation

⏱ 30 min·Whole Class

Movement Mat: Test and Sort

Lay out mats for whole class to test rolls, slides, stacks with mixed solids. Sort into property groups, discuss why, and record with drawings. Extend by predicting movements.

Prepare & details

Differentiate between a face, an edge, and a vertex on a 3D shape.

Facilitation Tip: Use the Movement Mat to model how to test each shape’s motion, then invite students to demonstrate to the group.

Setup: Tables/desks arranged in 4-6 distinct stations around room

Materials: Station instruction cards, Different materials per station, Rotation timer

• Remember
• Understand
• Apply
• Analyze
• Self-Management
• Relationship Skills

Teaching This Topic

Teach this topic by letting students handle real objects first, then naming the parts together. Avoid overwhelming them with too many new words at once. Use consistent language like ‘flat side,’ ‘line,’ and ‘corner’ before introducing ‘face,’ ‘edge,’ and ‘vertex.’ Research shows that pairing movement with vocabulary helps memory, so always connect the rolling or stacking action to the shape’s properties.

What to Expect

By the end of these activities, students will confidently use terms like ‘face,’ ‘edge,’ and ‘vertex’ to describe how different 3D solids move and stack. They will compare curved and flat surfaces and explain why some shapes roll while others stack.

Watch Out for These Misconceptions

Common Misconception

During Exploration Stations, watch for students who say all 3D shapes roll the same way.

What to Teach Instead

Bring out cubes and cylinders, and ask students to try rolling each. Have them feel the flat sides of the cube and observe how the cylinder rolls smoothly. Then, sort the shapes on the Movement Mat into ‘stacks well’ and ‘rolls well’ groups to clarify differences.

Common Misconception

During Shape Hunt, watch for students who think cylinders have no faces or edges.

What to Teach Instead

Have students trace the curved surface and the two flat circular faces of a cylinder they found. Ask them to run a finger along the circular edge where the faces meet. Pair students to share their findings and correct each other’s counts.

Common Misconception

During Build and Describe, watch for students who point to any point on a shape and call it a vertex.

What to Teach Instead

Ask students to build a cube with Multi-Link cubes and count the corners where three edges meet. Point to a single cube’s corner and ask, ‘Is this a vertex? Why or why not?’ Use their blocks to demonstrate that vertices only form where edges join.

Assessment Ideas

Exit Ticket

After Exploration Stations, give each student a small 3D solid. Ask them to draw the shape and label one face, one edge, and one vertex. If the shape does not have all three, they should write ‘none’ and explain why.

Discussion Prompt

During Movement Mat, present a sphere and a cube. Ask: ‘How are these shapes different when you try to move them? Which one can you stack easily, and why?’ Listen for terms like ‘rolls’ or ‘stacks’ and reasoning about flat sides.

Quick Check

After Build and Describe, hold up a 3D shape and ask students to point to its faces, edges, and vertices. Use a variety of shapes and ask targeted questions like, ‘Show me a flat part,’ or ‘Show me a corner where lines meet.’

Extensions & Scaffolding

• Challenge students to build a shape that rolls in one way but not another, then describe its faces, edges, and vertices to a partner.
• For students who struggle, provide shape templates with labeled faces so they can trace and count edges and vertices more easily.
• Deeper exploration: Ask students to create a ‘shape museum’ display where they group solids by their properties and write a short label for each group using the terms they’ve learned.

Key Vocabulary

Face	A flat surface on a 3D shape. A cube has six square faces.
Edge	A line where two faces of a 3D shape meet. A cube has twelve edges.
Vertex	A corner where three or more edges of a 3D shape meet. A cube has eight vertices.
Solid	A 3D object that has length, width, and height. Examples include cubes, spheres, and cones.