Shape Show and Tell

Overview

In this final lesson of the "Shape Explorers Adventure" unit, Year 2 students will deepen their understanding of 2D and 3D shapes by sharing their favourite shapes from previous lessons. They will describe their shapes using everyday and mathematical language, promoting communication skills and peer learning. The lesson culminates with a collaborative creation of a large shape collage from their collected images, encouraging creativity, spatial awareness, and teamwork.

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Curriculum Links (NZC Refresh – Mathematics and Statistics, Phase 1, Year 2)

Learning Objectives (Teaching sequence statements)

• Identify, describe and sort familiar 2D and 3D shapes by their attributes (e.g., sides, corners, faces, edges, vertices) .
• Use everyday and mathematical language to describe shape attributes and properties, consolidating vocabulary such as sides, vertices, edges, corners, and faces.
• Compose and decompose 2D shapes using attributes like lines of symmetry, angles, and side lengths .
• Communicate mathematical ideas clearly and coherently with peers, using appropriate vocabulary and representations.
• Work collaboratively in flexible groups to solve problems and engage in mathematical discussions.
• Reflect on and connect prior learning to consolidate conceptual understanding and procedural fluency .

Key Competencies Addressed

• Thinking: Students explain attributes of shapes and justify choices.
• Using language, symbols, and texts: Building specific shape vocabulary and expressing ideas orally.
• Relating to others: Engaging in peer feedback during presentations and group collage work.
• Managing self: Taking responsibility for preparing and sharing their shape.
• Participating and contributing: Collaborating in the class collage activity.

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Lesson Duration

45 minutes
Class size: 25 students

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Resources Needed

• Student-prepared shape artefacts or images collected in previous lessons
• Large bulletin board or wall space for collage
• Paper, scissors, glue, coloured pens/markers
• Prepared vocabulary card sets with shape terms (e.g., vertices, edges, faces, sides)
• Speaking and listening sentence starters (e.g., "My favourite shape is... It has... sides/edges.")
• Digital device or camera (optional, to photograph student shapes for collage)
• Peer feedback sheets or sticky notes for comments

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Lesson Structure

1. Getting Started (10 minutes)

• Warm-up Discussion: Gather students seated in a circle. Prompt them to briefly recall their favourite shapes explored in previous lessons (triangles, circles, rectangles, squares, spheres, cylinders, cones).
• Use questions to activate prior knowledge:
  • "What shape did you like the most? Why?"
  • "What does your shape look like? How many sides or faces does it have?"
• Introduce the learning intention: Today, you will be “shape presenters” and share your favourite shape’s attributes, using everyday and mathematical language.

2. Main Activity - Shape Presentations (20 minutes)

• Student Presentations: In small groups of 4–5, each student takes turns to share their chosen shape artefact or image. They will:
  • Name their shape (e.g.: “This is my favourite shape, a cylinder.”)
  • Describe its attributes: number of sides, edges, vertices, faces, and whether it is 2D or 3D.
  • Tell where they found this shape in the environment (real world connections).
  • Use sentence starters and vocabulary cards provided to support language.
• Peer Feedback: After each presentation, peers give positive feedback and ask one question, e.g., "I like how you described the edges."
• Teacher circulates to scaffold language, encourage correct vocabulary, and model how to give constructive feedback.

3. Group Activity - Shape Collage (10 minutes)

• Groups combine their shape images and artefacts on a large paper or bulletin board to create a colourful collage.
• Encourage students to group shapes by similar attributes (e.g., all shapes with 3 corners).
• Students label shapes on the collage with key vocabulary words learned during the unit.
• Teacher prompts discussions such as: "How are these shapes alike or different?" and "Can you find a shape with curved sides?"

4. Reflect and Connect (5 minutes)

• Whole class gathers to share one interesting thing they learned from a peer’s shape presentation or about the collage.
• Teacher highlights key vocabulary and reinforces the understanding of shape attributes as linked to everyday objects and mathematical language.
• Set a connection for the next learning experience, encouraging students to keep noticing shapes around them.

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Assessment Opportunities

• Formative Assessment: Observe students' use of mathematical language during presentations and peer interactions. Note accuracy in identifying shape attributes.
• Peer Feedback Quality: Monitor ability to give constructive comments and ask relevant questions using mathematical vocabulary.
• Collage Participation: Assess collaboration skills and understanding by how students classify and label shapes in the group activity.
• Self-Reflection: Students can complete a simple thumbs-up/down or smiley face self-assessment after presenting, reflecting on their confidence in using shape language.

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Differentiation and Inclusive Strategies

• Provide differentiated vocabulary support (simpler or more complex terms) depending on student ability.
• Use visual aids and real objects for students needing concrete reference points.
• Pair EAL learners with buddies and encourage use of first language to build understanding, reinforcing new vocabulary in English.
• Offer alternative ways to present (drawing shapes or using digital tools) for students with speech anxiety or difficulties.
• Scaffold peer feedback with sentence stems and model example questions.

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Extensions / Wow Factor Ideas

• Use a simple digital tool or tablet app to take photos of student favourite shapes and create a digital collage for display.
• Include a fun "shape detective" challenge where students find shapes linked to their peers’ favourite shapes during the day.
• Launch a class "Shape Explorer" badge or certificate for active participation in all five lessons, fostering a sense of achievement.

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This lesson carefully aligns with the New Zealand Curriculum refresh framework, focusing on communication in mathematics, use of mathematical language, spatial reasoning, and fostering collaboration and reflection, appropriate for Year 2 learners in a 45-minute session with 25 students .