Class: Primary 4
Term: 3rd Term
Week: 6
Age: 9 years
Duration: 45 minutes
Subject: General Mathematics
Curriculum Theme: Geometry and Measurement
Previous Lesson: Plane Shapes, Symmetry Lines and Properties of Rectangles and Squares.
Topic: PLANE SHAPES (Continued)
Subject Matter: Identification of right acute and obtuse angles, identification of vertical and horizontal lines, drawing four cardinal points, using cardinal points to locate positions of states in Nigeria, quantitative aptitude on plane shapes and cardinal points.

Specific Objectives

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

Cognitive Domain:

Identify right, acute, and obtuse angles.
Identify vertical and horizontal lines.
Draw and label the four cardinal points.
Use cardinal points to locate positions of states in Nigeria.
Solve quantitative aptitude problems involving plane shapes and cardinal points.

Affective Domain:

Appreciate the importance of angles and directions in daily life.
Participate actively in classroom discussions.

Psychomotor Domain:

Draw different types of angles accurately.
Draw vertical, horizontal, and cardinal lines.
Point out locations using a map and cardinal points.

Work cooperatively with classmates during group activities.
Share their understanding of directions with others.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum (Primary 4)
State Unified Scheme of Work (Primary 4)
New General Mathematics for Primary Schools 4

Instructional Materials

The teacher will teach this lesson with the aid of:

Protractor
Ruler
Pencil
Whiteboard and markers
A map of Nigeria
Flashcards showing different angles and lines
Mathematical set
Textbooks

Rationale for the Lesson

This lesson helps pupils understand different types of angles and lines, which are fundamental concepts in geometry. It also enables them to learn about cardinal points, which is important for understanding directions and navigating their environment effectively.

Prerequisite/Previous Knowledge

Pupils have basic knowledge of plane shapes and simple lines.

Lesson Content/Board Summary

PLANE SHAPES, ANGLES AND CARDINAL POINTS

Types of Angles

An angle is formed when two lines meet at a point. Angles are measured in degrees.

The following are types of angles:

Right Angle: An angle that measures exactly 90 degrees. It looks like a square corner.
Acute Angle: An angle that measures less than 90 degrees. It is smaller than a right angle.
Obtuse Angle: An angle that measures more than 90 degrees but less than 180 degrees. It is larger than a right angle.

Vertical and Horizontal Lines

A line is a straight path that extends in opposite directions without end.

The following are types of lines:

Vertical Line: A line that goes straight up and down, like a wall or a standing pole.
Horizontal Line: A line that goes straight across, from left to right, like the horizon or a flat ground.

Cardinal Points

Cardinal points are the four main directions on a compass. They help us to find our way around and locate places.

The four cardinal points are:

North (N)
South (S)
East (E)
West (W)

The sun rises in the East and sets in the West. If you face the rising sun, your right hand points South and your left hand points North.

Using Cardinal Points to Locate Positions

Cardinal points are used with maps to describe the position of one place relative to another (e.g., Abuja is North of Lokoja).

Quantitative Aptitude on Plane Shapes and Cardinal Points

This involves solving problems that combine knowledge of plane shapes, angles, and cardinal points, often requiring logical reasoning.

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher greets the pupils, reviews the previous lesson briefly, and then introduces the topic of angles, lines, and cardinal points by asking pupils about directions or corners they see.
Pupils’ Activity: Pupils respond to questions and listen attentively.
Learning Point: Pupils are prepared for the new lesson.

Step 2: Identification of Right, Acute, and Obtuse Angles

Time: 10 minutes
Teaching Skill: Explanation/Demonstration
Teacher’s Activity: The teacher defines an angle and explains the three types of angles (right, acute, obtuse) using a protractor, corners of the classroom, and flashcards. The teacher draws examples on the board.
Pupils’ Activity: Pupils identify different angles in the classroom and on flashcards, and draw examples in their notebooks.
Learning Point: Pupils understand and can identify different types of angles.

Step 3: Identification of Vertical and Horizontal Lines

Time: 5 minutes
Teaching Skill: Explanation/Observation
Teacher’s Activity: The teacher defines vertical and horizontal lines, pointing out examples in the classroom (e.g., edges of the door, top of the table, wall).
Pupils’ Activity: Pupils identify vertical and horizontal lines within their classroom and draw them in their notebooks.
Learning Point: Pupils can distinguish between vertical and horizontal lines.

Step 4: Drawing the Four Cardinal Points

Time: 10 minutes
Teaching Skill: Demonstration/Instruction
Teacher’s Activity: The teacher explains what cardinal points are and demonstrates how to draw and label North, South, East, and West on the board, relating them to sunrise and sunset.
Pupils’ Activity: Pupils draw and label the four cardinal points in their notebooks.
Learning Point: Pupils know the four cardinal points and how to represent them.

Step 5: Using Cardinal Points to Locate Positions

Time: 8 minutes
Teaching Skill: Application/Guidance
Teacher’s Activity: The teacher displays a map of Nigeria and guides pupils to use the cardinal points to locate the positions of different states in relation to each other. For example, “Which state is North of Kogi State?”
Pupils’ Activity: Pupils actively participate by pointing out states on the map and answering location questions using cardinal points.
Learning Point: Pupils can apply cardinal points to locate positions on a map.

Step 6: Quantitative Aptitude on Plane Shapes and Cardinal Points

Time: 5 minutes
Teaching Skill: Problem-Solving/Drill
Teacher’s Activity: The teacher provides simple quantitative aptitude problems that combine knowledge of plane shapes, angles, and cardinal points.
Pupils’ Activity: Pupils attempt to solve the problems individually or in pairs.
Learning Point: Pupils develop problem-solving skills related to the topic.

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

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

Define a right angle.
List the three types of angles discussed today.
Distinguish between a vertical line and a horizontal line with an example of each.
Mention the four cardinal points.
If the sun rises in the East, in which direction does it set?

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 2 minutes
Teaching Skill: Summarization
Teacher’s Activity: The teacher summarizes the key points of the lesson and assigns homework, which may include drawing and identifying angles and lines in their homes, or locating specific places on a map using cardinal points.
Pupils’ Activity: Pupils listen to the summary and copy down the homework.
Learning Point: Pupils consolidate their learning and prepare for independent practice.

Home Task: Solve three new exercises on PLANE SHAPES (Continued). Show each step and check each answer.

Lesson Keywords

Angle – The space between two lines that meet at a point.
Right Angle – An angle that measures exactly 90 degrees.
Acute Angle – An angle that measures less than 90 degrees.
Obtuse Angle – An angle that measures more than 90 degrees but less than 180 degrees.
Vertical Line – A line that goes straight up and down.
Horizontal Line – A line that goes straight across, from left to right.
Cardinal Points – The four main directions: North, South, East, West.
North – The direction opposite South.
South – The direction opposite North.
East – The direction where the sun rises.
West – The direction where the sun sets.

Differentiation

For pupils who grasp concepts quickly, the teacher can provide more complex quantitative aptitude problems or challenge them to identify angles in more intricate shapes. For pupils needing more support, the teacher can use physical objects to demonstrate angles and lines, provide simpler location tasks, and offer one-on-one guidance.

Note for teachers using this lesson plan

Ensure pupils have sufficient drawing materials. Encourage active participation by asking pupils to point out examples in their surroundings. Use a large, clear map of Nigeria for the cardinal points activity. Provide varied examples for quantitative aptitude questions to keep pupils engaged.