Mathematics · Year 1

Active learning ideas

Describing Properties of 2D Shapes (Sides & Vertices)

Active learning helps Year 1 students connect abstract properties of 3D shapes to real-world objects. Hands-on exploration lets them feel, turn, and compare shapes, which builds stronger memory than worksheets alone.

• National Curriculum Attainment Targets
• KS1: Mathematics - Geometry: Properties of Shapes

• 15–25 min
• Pairs → Whole Class
• 3 activities

Activity 01

• Inquiry Circle
• 20 min · Small Groups

Inquiry Circle: Will it Roll or Stack?

Groups are given a set of 3D objects and a ramp. They must predict which shapes will roll, slide, or stack, test their theories, and then record their findings on a large group chart.

Compare a square and a rectangle based on their properties.

Facilitation Tip

During Collaborative Investigation: Will it Roll or Stack?, provide real objects rather than pictures so students can physically test each shape's movement.

What to look for

Show students cards with different 2D shapes. Ask them to hold up fingers to indicate the number of sides and vertices for each shape. Observe accuracy and provide immediate feedback.

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Activity 02

• Think-Pair-Share
• 15 min · Pairs

Think-Pair-Share: 3D Shape Builders

Pairs are given playdough and straws. One student asks for a shape with '6 square faces'. The other must build it. They then discuss which parts are the 'faces' and which are the 'edges'.

Explain why a circle has no straight sides or vertices.

Facilitation Tip

During Think-Pair-Share: 3D Shape Builders, circulate and prompt pairs with questions like 'How many faces does your pyramid have?' to keep them focused on properties.

What to look for

Give each student a worksheet with a square, a rectangle, and a circle. Ask them to write the number of sides and vertices for the square and rectangle, and to explain why the circle has neither.

• Understand
• Apply
• Analyze
• Self-Awareness
• Relationship Skills

Activity 03

• Gallery Walk
• 25 min · Whole Class

Gallery Walk: The 3D City

Students use recycled materials (boxes, tubes, balls) to build a model city. They then walk around the 'city' and use sticky notes to label the 3D shapes they see used in the buildings.

Construct a shape with three sides and three vertices.

Facilitation Tip

During Gallery Walk: The 3D City, assign each student a shape to explain to visitors, which builds confidence and reinforces vocabulary.

What to look for

Present two shapes, for example, a square and a rhombus. Ask students: 'How are these shapes the same in terms of sides and vertices? How are they different?' Listen for precise vocabulary and comparative reasoning.

• Understand
• Apply
• Analyze
• Create
• Relationship Skills
• Social Awareness

A few notes on teaching this unit

Start with physical models to avoid confusion between 2D and 3D terms. Avoid rushing to abstract drawings; let students manipulate shapes first. Research shows that touching and moving objects improves spatial reasoning more than visual-only tasks. Use clear, consistent language like 'flat face' and 'curved surface' to prevent misconceptions from forming early.

By the end of these activities, students will name common 3D shapes accurately, describe their properties using vocabulary like flat, curved, roll, and stack, and connect 2D faces to 3D solids in their environment.

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Watch Out for These Misconceptions

• During Collaborative Investigation: Will it Roll or Stack?, watch for students calling a sphere a 'circle' or a cube a 'square'.

  Prompt students to pick up the shape and ask, 'Is this flat like a piece of paper or can I hold it in my hand like a ball?' Use the physical difference to redirect their vocabulary.

• During Gallery Walk: The 3D City, watch for students struggling to classify shapes with curved surfaces as 3D.

  Use the sorting hoop to divide shapes into three groups: only flat faces, only curved surfaces, and both. Ask students to explain why a sphere belongs in the curved surface group and how that makes it 3D.

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Methods used in this brief

• Inquiry Circle
• Think-Pair-Share
• Gallery Walk