Lesson Notes By Weeks and Term v3 - Primary 1
Two dimensional shapes
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Two dimensional shapes
Download the Lessonotes Mobile Nigeria 2025 app for faster lesson access on Android and iPhone.
Subject: General Mathematics
Class: Primary 1
Term: 1st Term
Week: 11
Theme: Mensuration And Geometry Primary One
This page supports the lesson note with a companion video and a short classroom-ready summary.
For class groups and homework, share this lesson page so learners also get the summary, objectives, and full lesson context.
Watch on YouTubeidentify a Square, a Rectangle and a Circle. match and name a square, a rectangle and a Circle. distinguish between squares and rectangles. mention square, rectangular and circular shapes in homes.
This section provides a detailed explanation of the key concepts for the teacher to effectively deliver the lesson. What are Two-Dimensional (2D) Shapes? Two-dimensional shapes, also known as flat shapes, are figures that can be drawn on a flat surface like a piece of paper or a blackboard.
They have only two dimensions: length and width (or breadth). They do not have thickness. In Primary 1, the focus is on recognizing and naming these basic shapes. Rectangle (5 minutes)
1. Teacher Activity: Places a square and a rectangle cut-out side-by-side on the board.
Asks guiding questions: "How are these two shapes similar? (Both have 4 sides, 4 corners). How are they different? (All sides of the square are equal, but only opposite sides of the rectangle are equal)." Emphasizes the critical difference in side lengths.
2. Student Activity: Students observe and discuss the similarities and differences. Students verbally state the difference in side lengths.
Activity 6: Mentioning Shapes in Homes (5 minutes)
1. Teacher Activity: Asks students to think about things they see at home or on their way to school. "Can you name something at home that looks like a square?" "Can you name something at home that looks like a rectangle?" "Can you name something at home that looks like a circle?" Encourages a variety of answers.
2. Student Activity: Students provide examples of square, rectangular, and circular objects from their daily lives. (e.g., "My mother's cooking pot base is a circle," "Our door is a rectangle," "My small mirror is a square.")
C. Conclusion (5 minutes)
1. Teacher Activity:** Recap the three shapes learned: square, rectangle, circle.
Quick quiz: Point to a shape, ask for its name. Ask for an example of a shape in the room. Commends students for their participation. The following activities are designed to guide the lesson delivery, ensuring active student participation and practical engagement.
Materials: Large cut-outs of a square, rectangle, and circle (from cardboard or chart paper). Smaller individual cut-outs of squares, rectangles, and circles for students.
Chart showing names: "SQUARE", "RECTANGLE", "CIRCLE".
Real-life objects: a square cracker, a rectangular phone, a circular plate, a book, a coin, a small window frame, a door. Drawing materials (chalkboard, chalk, individual slates/notebooks).
A. Introduction (5 minutes)
1. Teacher Activity: The teacher displays various familiar objects with distinct shapes (e.g., a book, a small plate, a square biscuit).
2. Student Activity: Students observe the objects. The teacher asks, "What do you notice about these objects? How are they different?" (Encourage students to describe physical attributes, e.g., "This one is round," "This one has straight lines.")
B. Lesson Development (30 minutes)
Activity 1: Introducing the Square (10 minutes)
1. Teacher Activity: Holds up a large square cut-out. States clearly, "This is a square." Points to and counts the four sides, emphasizing that they are all equal. "One, two, three, four sides. All the sides are the same length." Points to and counts the four corners. Asks students to repeat the name "Square" several times. Shows real-life square objects (e.g., a square cracker, a square tile).
2. Student Activity: Students observe the square cut-out and real objects. Students repeat the name "Square." Students identify the sides and corners as the teacher points. Students touch their individual small square cut-outs, tracing the sides and corners.
Activity 2: Introducing the Rectangle (10 minutes)
1. Teacher Activity: Holds up a large rectangle cut-out. States clearly, "This is a rectangle." Points to and counts the four sides. "One, two, three, four sides." Emphasizes that opposite sides are equal, demonstrating with hands or a ruler. "Look, these two long sides are equal, and these two short sides are equal." Points to and counts the four corners. Asks students to repeat the name "Rectangle" several times. Shows real-life rectangular objects (e.g., a book, a phone, a door).
2. Student Activity: Students observe the rectangle cut-out and real objects. Students repeat the name "Rectangle." Students identify the sides and corners, noting the difference in side lengths. Students touch their individual small rectangle cut-outs, tracing the sides and corners.
Activity 3: Introducing the Circle (5 minutes)
1. Teacher Activity: Holds up a large circle cut-out. States clearly, "This is a circle." Explains, "It is round. It has no straight sides and no corners." Asks students to repeat the name "Circle" several times. Shows real-life circular objects (e.g., a plate, a coin, a clock).
2. Student Activity: Students observe the circle cut-out and real objects. Students repeat the name "Circle." Students confirm it has no straight sides or corners by tracing its outline.
Activity 4: Matching and Naming (10 minutes)
1. Teacher Activity: Displays the three shape cut-outs randomly on the board. Displays the name cards ("SQUARE", "RECTANGLE", "CIRCLE") separately. Calls individual students to come forward and match a shape to its correct name card. Holds up a shape and asks the class, "What is this shape?" Holds up a name card and asks the class, "Which shape is this name for?"
2. Student Activity: Individual students take turns matching shapes to names. Students participate in choral response, naming shapes and identifying names.
Activity 5: Distinguishing between Square and Rectangle (5 minutes)
1. Teacher Activity: Places a square and a rectangle cut-out side-by-side on the board.
Asks guiding questions: "How are these two shapes similar? (Both have 4 sides, 4 corners). How are they different? (All sides of the square are equal, but only opposite sides of the rectangle are equal)." Emphasizes the critical difference in side lengths.
2. Student Activity: Students observe and discuss the similarities and differences. Students verbally state the difference in side lengths.
Activity 6: Mentioning Shapes in Homes (5 minutes)
1. This section provides practice questions with step-by-step solutions for the teacher to use during the lesson, reinforcing the concepts.
Question 1: Identify the Shapes Look at the shapes below. Write the name of each shape. a) ``` | | | | | | ``` b) ``` | | | | | | ``` c) ``` ``` Solution 1: a)
Square Reasoning: The shape has four straight sides, and all sides appear to be of equal length. It also has four corners. b)
Rectangle Reasoning: The shape has four straight sides and four corners.
However, it has two longer sides and two shorter sides, with only opposite sides being equal in length. c)
Circle Reasoning: The shape is perfectly round. It has no straight sides and no corners.
Question 2: Match Shapes to Names Draw a line from each shape to its correct name. (Shape A: A drawn rectangle) (Shape B: A drawn circle) (Shape C: A drawn square)
Names: Rectangle Square Circle Solution 2: Shape A (Rectangle) matches with "Rectangle". Shape B (Circle) matches with "Circle". Shape C (Square) matches with "Square".
Reasoning: This tests the ability to visually identify and correctly associate the written name with the corresponding shape based on their learned properties.
Question 3: Distinguishing Squares and Rectangles Look at the two shapes below. Write one way they are different. (Shape 1: A drawn square) (Shape 2: A drawn rectangle)
Solution 3: One way they are different is: A square has all four of its sides equal in length. A rectangle has only its opposite sides equal in length (it has two long sides and two short sides).
Reasoning: This question directly targets Objective 3, requiring students to articulate the primary difference in side lengths between squares and rectangles.
Question 4: Real-life Examples Name one object in your home that has a circular shape.
Solution 4: Possible answers (among others): A plate (for eating `fufu` or rice). A wall clock. A cooking pot's base. A coin (e.g., ₦1 coin). A bucket's base.
Reasoning: This assesses Objective 4, requiring students to connect the abstract shape concept to concrete objects in their familiar Nigerian environment.
Understanding 2D shapes is fundamental and integrates into various aspects of Nigerian life: Architecture and Construction: Many Nigerian houses have rectangular doors and windows. Floors are often tiled with square or rectangular tiles. Compound walls are typically rectangular. Recognizing these shapes helps in appreciating the structure and design of local buildings, from simple mud houses to modern concrete structures.
Application:* Students can observe their homes and classroom, identifying the shapes of different building components.
Local Crafts and Art: Traditional Nigerian patterns in fabrics like `Adire` or `Akwete` often incorporate geometric shapes. Weaving mats (e.g., `taba`) frequently results in rectangular forms. Pottery may feature circular bases or decorative elements.
Application:* Teachers can bring samples of local fabrics or mats to class and ask students to identify the shapes used in their patterns or overall form.
Everyday Objects and Community Living: Common objects like mobile phones, books, chalkboards, and most desks are rectangular. Plates for `eba` or `fufu`, car tyres, coins, and `puff-puff` are circular. Small boxes or framed pictures can be square. Even road signs (though some are triangular or octagonal) sometimes use rectangular or circular bases.
Application:* A class walk around the school compound or a 'shape hunt' in the classroom can make this tangible, connecting learning to their immediate environment.