Class: Junior Secondary School 2 (JSS 2 / JS2)
Term: Third Term
Week: 3
Age: 13 years
Duration: 45 minutes
Subject: Basic Science and Technology
Curriculum Theme: Physical and Health Education
Previous Lesson: Prevention Measures Against Non: Communicable Disease.
Topic: POSTURE AND POSTURAL DEFECTS
Subject Matter: Meaning of posture and postural defects, Kinds of posture and postural defects, Kinds of posture: sitting, walking, lifting

Specific Objectives

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

Cognitive Domain:

Define posture and postural defects.
State the different kinds of posture.
Identify common postural defects.

Affective Domain:

Appreciate the importance of maintaining good posture.
Recognize the health implications of poor posture.

Psychomotor Domain:

Demonstrate correct sitting posture.
Demonstrate correct walking posture.
Demonstrate correct lifting posture.

Encourage their peers to adopt and maintain good posture.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Junior Secondary Schools.
State Unified Scheme of Work.
MacMillan Basic Science for Junior Secondary Schools 2.

Instructional Materials

The teacher will teach this lesson with the aid of:

Charts showing examples of good and bad postures.
Pictures illustrating various postural defects (e.g., scoliosis, kyphosis).
Textbooks and notebooks.

Rationale for the Lesson

This lesson helps pupils understand the correct ways to sit, stand, walk, and lift objects. It also enables them to identify and prevent common physical problems that can arise from poor posture, promoting overall body health and well-being.

Prerequisite/Previous Knowledge

Pupils have basic knowledge of the human body, its parts, and general health practices.

Lesson Content/Board Summary

POSTURE AND POSTURAL DEFECTS

Meaning of Posture

Posture refers to the position in which you hold your body when standing, sitting, or lying down. Good posture involves holding your body in a way that minimizes strain on your muscles and ligaments while keeping your spine aligned.

Meaning of Postural Defects

Postural defects are abnormalities or deviations from the normal alignment of the body, especially the spine. These defects often result from habitually poor posture, injury, or underlying medical conditions.

Kinds of Posture

The following are common kinds of posture that require proper alignment:

Sitting Posture:
- Correct: Sit with your back straight against the chair, feet flat on the floor, and shoulders relaxed. Avoid slouching or leaning forward excessively.
- Incorrect: Slouching, sitting on the edge of the chair, crossing legs for long periods, or sitting with a rounded back.
Walking Posture:
- Correct: Walk tall with your head up, shoulders back and relaxed, and eyes looking forward. Your arms should swing naturally, and your feet should point straight ahead.
- Incorrect: Slouching, dragging feet, looking at the ground, or walking with a stiff body.
Lifting Posture:
- Correct: Bend your knees and hips, not your back. Keep the object close to your body and lift using your leg muscles, keeping your back straight.
- Incorrect: Bending from the waist with straight legs, twisting while lifting, or lifting objects too far away from the body.

Common Postural Defects

Some common postural defects include:

Scoliosis: An abnormal sideways curvature of the spine, making the spine look like an “S” or “C” shape.
Kyphosis: An excessive outward curve of the upper back, leading to a hunched or rounded back appearance.
Lordosis: An excessive inward curve of the lower back, causing the stomach to stick out and the buttocks to appear prominent (swayback).
Knock-knees (Genu Valgum): A condition where the knees angle inward and touch each other when the legs are straightened.
Bowlegs (Genu Varum): A condition where the legs curve outward at the knees, so they do not touch even when the ankles are together.

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 by asking pupils how they sit or stand.
Pupils’ Activity: Pupils respond to the teacher’s greetings and questions, and share their ideas on sitting or standing.
Learning Point: Pupils are engaged and the topic is introduced.

Step 2: Meaning of Posture

Time: 7 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher explains the meaning of posture, emphasizing its importance for body alignment and health. The teacher writes the definition on the board.
Pupils’ Activity: Pupils listen attentively, ask questions for clarification, and copy the definition into their notebooks.
Learning Point: Pupils understand the meaning of posture.

Step 3: Meaning of Postural Defects

Time: 7 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher defines postural defects and explains that they are deviations from normal body alignment. The teacher writes the definition on the board.
Pupils’ Activity: Pupils listen, ask questions, and copy the definition into their notebooks.
Learning Point: Pupils understand the meaning of postural defects.

Step 4: Kinds of Posture (Sitting)

Time: 6 minutes
Teaching Skill: Demonstration/Practice
Teacher’s Activity: The teacher demonstrates correct and incorrect sitting postures using a chair, explaining the benefits of good posture and the risks of poor posture. The teacher then guides pupils to practice.
Pupils’ Activity: Pupils observe the demonstrations and practice the correct sitting posture.
Learning Point: Pupils learn and practice correct sitting posture.

Step 5: Kinds of Posture (Walking and Lifting)

Time: 6 minutes
Teaching Skill: Demonstration/Practice
Teacher’s Activity: The teacher demonstrates correct and incorrect walking and lifting postures, explaining the principles for each. The teacher then asks pupils to practice.
Pupils’ Activity: Pupils observe the demonstrations and practice the correct walking and lifting postures.
Learning Point: Pupils learn and practice correct walking and lifting postures.

Step 6: Common Postural Defects

Time: 7 minutes
Teaching Skill: Visual Aid/Explanation
Teacher’s Activity: The teacher uses charts and pictures to show and explain common postural defects like scoliosis, kyphosis, lordosis, knock-knees, and bowlegs. The teacher briefly describes each defect.
Pupils’ Activity: Pupils observe the charts and pictures, ask questions, and take notes on the different defects.
Learning Point: Pupils identify and understand common postural defects.

Step 7: Evaluation/Review

Time: 5 minutes
Teaching Skill: Questioning/Assessment
Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

What is posture?
Define postural defects.
Mention two kinds of posture.
Demonstrate the correct way to sit.
Name two common postural defects.

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/Assignment
Teacher’s Activity: The teacher summarizes the key points of the lesson and assigns homework: “Draw and label two examples of good posture and two examples of poor posture.”
Pupils’ Activity: Pupils listen to the summary and copy the homework.
Learning Point: The lesson is concluded, and pupils have an assignment to reinforce learning.

Lesson Keywords

Posture – The position in which you hold your body.
Postural defects – Abnormal deviations from normal body alignment.
Scoliosis – Sideways curvature of the spine.
Kyphosis – Excessive outward curve of the upper back.
Lordosis – Excessive inward curve of the lower back.
Sitting – The act of resting with the body supported by the buttocks.
Walking – The act of moving on foot.
Lifting – The act of raising an object.

Differentiation

For pupils who grasp concepts quickly, the teacher can encourage them to research more about the causes and prevention of specific postural defects. For pupils needing more support, the teacher can provide one-on-one guidance during practical demonstrations and use simpler language for explanations.

Note for teachers using this lesson plan

Emphasize practical demonstrations and encourage active pupil participation in practicing correct postures. Use real-life scenarios to make the lesson relatable and stress the long-term benefits of good posture for health and well-being.