2D and 3D Shapes for Primary 2

Class: Primary 2
Term: Second Term
Week: 1
Age: 7 years
Duration: 40 minutes
Subject: Mathematics
Curriculum Theme: Not separately stated in the scheme
Previous Lesson:
Topic: 2-Dimensional and 3-Dimensional Shapes
Subject Matter: Identification and classification of flat and solid shapes, properties and familiar examples.

Specific Objectives

By the end of the lesson, pupils should be able to:

Cognitive Domain

• identify common 2D and 3D shapes
• sort shapes into flat and solid groups
• name familiar objects that match given shapes
• draw common 2D shapes and simple representations of 3D shapes

Affective Domain

• show interest in shapes found around the school

Psychomotor Domain

• trace, draw and sort shape models

Social Domain

• cooperate in a classroom shape hunt

Reference Materials

The following resources were used in planning this lesson:

• 9 Years Basic Education Curriculum.
• Relevant State Unified Scheme of Work.
• An approved Primary School textbook or teaching resource for the subject.

Instructional Materials

The teacher will teach this lesson with the aid of:

• Concrete objects of circle, rectangle, square
• chalkboard or whiteboard
• topic flash cards
• worksheet

Rationale for the Lesson

This lesson helps pupils understand and use 2-dimensional and 3-dimensional shapes through familiar objects, clear examples and guided practice. It builds a foundation for accurate mathematical thinking in school and daily life.

Prerequisite/Previous Knowledge

Pupils can count familiar objects, follow simple instructions and use basic number language needed for the lesson. The teacher should check this quickly with concrete materials before introducing the new work.

Lesson Content/Board Summary

2-Dimensional and 3-Dimensional Shapes

Meaning of Shape

A shape is the form or outline of an object. Shapes may be flat or solid.

Two-Dimensional Shapes

A 2D shape is flat. It has length and width.

• Circle: round with no straight side or corner.
• Triangle: 3 straight sides and 3 corners.
• Square: 4 equal straight sides and 4 square corners.
• Rectangle: 4 straight sides and 4 square corners; opposite sides are equal.

Three-Dimensional Shapes

A 3D shape is solid. It has length, width and height and can be held.

• Cube: like a dice or sugar cube.
• Cuboid: like a matchbox or book.
• Cylinder: like a milk tin.
• Cone: like a party hat.
• Sphere: like a football or orange.

Comparing 2D and 3D Shapes

Two-dimensional and three-dimensional shapes differ in their dimensions and physical form. Their main differences are shown below:

Suggested Lesson Video

The teacher may use this short video after the practical activity to reinforce the lesson.

Teaching Methods/Instructional Techniques

Discussion, Demonstration, Guided Practice, Practical Activity and Cooperative Learning.

Instructional Procedures

Step 1: Introduction with Familiar Shapes

Time: 4 minutes

Teaching Skill: Set Induction/Questioning

Teacher’s Activity: The teacher displays a square card, rectangular book, circular lid, triangular card, ball and carton and asks pupils which can lie flat and which can be held as solids.

Pupils’ Activity: Pupils handle and sort the objects into flat shapes and solid shapes.

Learning Point: Shapes may be classified as 2D or 3D.

Step 2: Identifying 2D Shapes

Time: 5 minutes

Teaching Skill: Explanation/Observation

Teacher’s Activity: The teacher traces the square, rectangle, triangle and circle on the board and names their straight sides, corners or curved boundary.

Pupils’ Activity: Pupils name each traced shape and count its sides and corners.

Learning Point: A 2D shape is flat and is described by its boundary.

Step 3: Identifying 3D Shapes

Time: 5 minutes

Teaching Skill: Demonstration/Modelling

Teacher’s Activity: The teacher turns a cube, cuboid, cylinder and sphere to show faces, edges, corners and curved surfaces.

Pupils’ Activity: Pupils identify each solid and point to a face, edge, corner or curved surface where applicable.

Learning Point: A 3D shape is solid and can be held and turned.

Step 4: Comparing Flat and Solid Shapes

Time: 6 minutes

Teaching Skill: Guided Practice

Teacher’s Activity: The teacher pairs a circle with a sphere and a rectangle with a cuboid, then asks how each pair differs.

Pupils’ Activity: Pupils state that the flat shapes can be drawn while the solids occupy space and can be held.

Learning Point: Similar outlines do not make a 2D shape and 3D shape the same.

Step 5: Shape Hunt and Classification

Time: 5 minutes

Teaching Skill: Practical Activity/Problem Solving

Teacher’s Activity: The teacher assigns groups to find safe classroom objects and place their names beneath 2D or 3D headings.

Pupils’ Activity: Groups classify a clock face, book, box, ball and other approved objects and explain one choice.

Learning Point: Properties, not only object names, determine shape classification.

Step 6: Independent Shape Record

Time: 5 minutes

Teaching Skill: Independent Practice

Teacher’s Activity: The teacher asks pupils to draw and label two 2D shapes and name two 3D objects.

Pupils’ Activity: Pupils complete the drawings and labels individually.

Learning Point: Pupils identify and represent common flat and solid shapes.

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates learning by asking the following questions:

1. Name two 2D shapes.
2. Name three 3D shapes.
3. State one difference between a 2D shape and a 3D shape.
4. Sort the supplied models into flat shapes and solid shapes.
5. Draw and label a rectangle and a cylinder.

Pupils’ Activity: Pupils name, classify and describe the supplied shapes and objects.

Learning Point: Pupils distinguish 2D shapes from 3D shapes using observable properties.

Step 8: Conclusion

Time: 5 minutes

Teaching Skill: Summary/Feedback

Teacher’s Activity: The teacher holds up one flat shape and one solid and reviews the terms side, corner, face and curved surface.

Pupils’ Activity: Pupils give the shape names and one correct property of each.

Learning Point: Flat and solid shapes are recognised by their properties.

Lesson Keywords

• 2D shape – a flat shape with length and width
• 3D shape – a solid shape with length, width and height
• side – a straight boundary of a flat shape
• surface – the outside part of a solid shape

Differentiation

Support: Use real objects, larger pictures, teacher modelling, paired work and fewer examples at a time. Allow pupils who need help to point, match, count or demonstrate before writing.

Extension: Ask faster pupils to create one additional correct example, explain their method independently or apply the same idea to another familiar situation without moving to a new topic.

Note for teachers using this lesson plan

Bring enough real models for pupils to touch and turn. Do not call a drawn circle a sphere; use a plate outline for a circle and a ball for a sphere so pupils can see the difference. Use the suggested video only after the concrete explanation or as a short reinforcement; pause it for questions. Understanding is shown when pupils can complete the evaluation task with the correct language, method and unit where required.