Geometry Mission Launch

Overview

Lesson 1 of 10 in Shape Shifters: Transformations. Students investigate 2D and 3D shapes through a mystery video, collaborative sorting and hands-on models, building the vocabulary and spatial visualisation needed for later transformation work.

Learning intentions

• WALT identify and describe faces, edges and vertices on 3D shapes.
• WALT connect 2D shapes with the faces and nets of 3D shapes.
• WALT sort and classify shapes using observable properties.
• WALT use mathematical language to explain our thinking.

Success criteria

• I can identify faces, edges and vertices on a 3D shape.
• I can name 2D shapes that make up the faces of a 3D shape.
• I can sort shapes and explain the property I used.
• I can make and describe a mental picture of a shape from different viewpoints.

Curriculum links

• Geometry: identify, describe and classify 2D and 3D shapes using their properties.
• Geometry: recognise relationships between 2D shapes and 3D objects, including faces and nets.
• Mathematical processes: communicate, justify and use mathematical language.
• Key competencies: thinking; managing self; participating and contributing.

Lesson structure (60 minutes)

1. 0–7 minutes – Mystery hook

Prepare students in five groups of five. Open with the mystery video and opening question: “What 3D shape could be hidden inside this object?” Show a short, silent or narrated video revealing a familiar object from unusual viewpoints, such as a parcel, building or game die.

Students make a quick individual prediction, then share with a partner. Ask: “What clues helped you?” Record words students use, without correcting all vocabulary immediately.

2. 7–15 minutes – Build the language

Display the shape vocabulary slides and use a large cube or labelled model. Explicitly teach:

• face: a flat surface
• edge: where two faces meet
• vertex: a corner where edges meet

Students trace each feature on their own model. Clarify that a sphere has a curved surface but no flat faces, straight edges or vertices. Use labelled models and vocabulary cards for students needing visual or language support.

3. 15–30 minutes – Shape-sorting mission

Give each group a collection of safe 2D and 3D shape models or classroom objects. Distribute the 2D shape property cards as additional sorting prompts. Show the instructions on the sorting challenge slides.

Groups sort the shapes in any way they choose, then label each group with the sorting rule. Encourage rules such as “has curved surfaces”, “has four vertices” or “has only square faces”. Groups must be ready to explain one shape that was difficult to place and why. Rotate one student from each group to view another group’s sorting rule.

4. 30–43 minutes – Faces and viewpoints

Demonstrate a cube, cuboid, triangular prism and pyramid. Students handle models and complete the first section of the Shape Shifters investigation worksheet: identify faces, edges and vertices, draw or name the 2D shapes on selected faces, and sketch one object from a different viewpoint.

Pause for a pair discussion: “Can two different 3D shapes have the same type of face?” Invite examples, such as a cube and a square-based pyramid. Circulate, checking that students distinguish a face from an edge.

5. 43–53 minutes – Classify like mathematicians

Return to the classification discussion slides. Present a mystery statement, such as: “This shape has five faces, eight edges and five vertices. What might it be?” Groups use models to test possible answers.

Students complete the second worksheet section by choosing one 3D shape and writing at least two properties that classify it. Extension students classify the same shape in two different ways, for example by its number of faces and by the 2D shapes on its faces.

6. 53–60 minutes – Mission debrief

Students complete the worksheet reflection: “One new word I can use is…”, “A 2D and 3D connection is…” and “A question I have about changing shapes is…”. Use the plenary and next-mission slides to revisit the learning intentions.

Invite three students to share different observations. Explain that the next lessons will investigate how shapes can move, turn, flip and change position while mathematicians track what stays the same.

Resources

• the Geometry Mission Launch slide deck, including the mystery video, vocabulary teaching, sorting instructions, discussion prompts and plenary.
• the Shape Shifters investigation worksheet.
• A short 3D-shape mystery video, embedded or ready to play in the slide deck.
• Sets of 2D and 3D shape models or safe classroom objects, one set per group.
• Large labelled cube, cuboid, prism, pyramid and sphere models.
• Vocabulary cards for face, edge, vertex, flat surface, curved surface and net.
• Pencils, coloured pencils and group sorting labels.
• Five group tables or trays for sorting materials.

Assessment

• Observe group explanations for accurate use of face, edge, vertex and curved surface.
• Check the worksheet for correct identification of properties and links between 2D faces and 3D objects.
• Use the final reflection to identify vocabulary gaps and misconceptions for Lesson 2.

Differentiation

• Support: provide labelled models, vocabulary cards with simple diagrams, a reduced selection of shapes and sentence frames such as “I sorted this because it has…”.
• Support: pair students strategically and allow students to touch, turn and trace models before drawing or writing.
• Extension: ask students to classify one shape using at least three properties, or find two shapes that share one property but differ in another.
• EAL/SEN: pre-teach vocabulary with gestures and real objects; accept oral explanations, labelled drawings or scribed responses instead of extended writing.