Mathematics · 1st Year

Active learning ideas

Exploring 2-D Shapes in Our World

Let's become shape detectives! This topic encourages your pupils to look closely at the world around them to find the circles, squares, and triangles hidden in plain sight.

• NCCA Curriculum Specifications
• NCCA: PSMC - Shape and space - 2-D shapes

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

Activity 01

• Outdoor Investigation Session
• 20 min · Pairs

Shape Detectives Hunt

Give children magnifying glasses (real or cardboard) and send them on a 'shape hunt' around the classroom or school grounds. They can have a clipboard with pictures of shapes to tick off as they find them in objects like windows, clocks, and books.

Identify a square object in this room.

Facilitation Tip

Before starting, review the shapes they will be looking for as a whole class.

What to look for

Observe children as they work in small groups to sort a pile of shapes. Listen to their discussions and justifications for their sorting rules.

• Remember
• Understand
• Analyze
• Social Awareness
• Self-Awareness
• Decision-Making

Activity 02

• Outdoor Investigation Session
• 15 min · Small Groups

Feely Bag Sorting

Place a variety of plastic or wooden 2-D shapes into an opaque bag. Children take turns reaching in without looking, describing what they feel ('It has three corners and three straight sides'), and guessing the shape before pulling it out.

Explain how you know that a window is a rectangle.

Facilitation Tip

Encourage children to use specific vocabulary like 'side' and 'corner' in their descriptions.

What to look for

Give each child a small collection of shapes. Ask them to hold up a specific shape ('Show me the triangle') or a shape with specific properties ('Show me a shape with three corners').

• Remember
• Understand
• Analyze
• Social Awareness
• Self-Awareness
• Decision-Making

Activity 03

• Outdoor Investigation Session
• 25 min · Individual

Making Shape Pictures

Provide a collection of pre-cut paper shapes in various colours and sizes. Ask the children to create a picture, like a house, a robot, or an animal, by gluing the shapes onto a larger piece of paper and then describing their creation.

Compare a circle and an oval you have found.

Facilitation Tip

Ask follow-up questions like, 'How many triangles did you use to make your rocket?'

What to look for

Provide children with a simple worksheet showing various shapes. They can colour in the shapes they can name with a green crayon and the ones they are unsure of with an orange crayon.

• Remember
• Understand
• Analyze
• Social Awareness
• Self-Awareness
• Decision-Making

A few notes on teaching this unit

Begin with tangible, hands-on exploration using shape blocks and puzzles. Model the correct vocabulary clearly and consistently. Gradually move from simple matching to sorting by a single property, always asking 'Why did you put those together?' to encourage mathematical reasoning. Use lots of real-world examples to make the learning relevant.

After these activities, your pupils will be able to confidently sort shapes into groups and use words like 'sides' and 'corners' to explain their sorting rules.

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Watch Out for These Misconceptions

• A square turned on its point is a 'diamond', not a square.

  A square is always a square no matter how it is turned. Show the children a square and rotate it, counting the four equal sides and four corners together to prove it's the same shape.

• Only equilateral triangles that are pointing upwards are 'triangles'.

  Any shape with three straight sides and three corners is a triangle. Show a wide variety of triangles, including long, thin ones and ones pointing in different directions, to broaden their understanding.

• Shapes are only the outline, not the filled-in space.

  Use both outlines (like drawings) and solid shapes (like plastic blocks) interchangeably. Explain that both the drawing of the square and the block itself are called a square.

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Methods used in this brief

• Outdoor Investigation Session