Class: Senior Secondary School 1 (SS1, SS 1, SSS1, SSS 1)
Term: Second Term
Week: 6
Age: 15 years
Duration: 45 minutes
Subject: Physical Education
Curriculum Theme: Physical Education
Previous Lesson: The Circulatory System.
Topic: The Skeletal System
Subject Matter: definition of skeletal system, types of bones, definition of joints, kinds of joints, identification and labeling of main parts of the skeleton

Specific Objectives

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

Cognitive Domain:

Define the skeletal system.
Identify and describe different types of bones.
Define a joint.
List and explain various kinds of joints.

Affective Domain:

Appreciate the importance of the skeletal system for body support and movement.
Show interest in learning about the structure and function of the human body.

Psychomotor Domain:

Draw and label the main parts of the human skeleton.
Identify major bones on a diagram or model.

Participate actively in class discussions about the skeletal system.
Collaborate with peers to identify parts of the skeleton if working in groups.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Physical and Health Education.
State Unified Scheme of Work for Senior Secondary Schools.
Physical and Health Education for Senior Secondary Schools, Book 1.
Online resources for human anatomy diagrams.

Instructional Materials

The teacher will teach this lesson with the aid of:

Pictures and charts showing the human skeleton.
Textbooks with diagrams of the skeletal system.
CD-ROMs or digital images displayed via projectors (if available).
A model of the human skeleton (if available).

Rationale for the Lesson

Understanding the skeletal system helps pupils know how their bodies are structured and how they move. This knowledge is important for maintaining good posture, preventing injuries, and appreciating the complexity of the human body in daily life and sports.

Prerequisite/Previous Knowledge

Pupils have basic knowledge of body parts and some understanding of how the body moves, possibly from their primary and junior secondary school Physical Education lessons.

Lesson Content/Board Summary

The Skeletal System

Definition of Skeletal System

The skeletal system is the framework of bones and connective tissues (like cartilage, tendons, and ligaments) that supports the body, protects internal organs, allows movement, and produces blood cells.

Functions of the Skeletal System

The skeletal system performs the following functions:

Provides support and shape to the body.
Protects vital internal organs (e.g., brain, heart, lungs).
Allows movement through articulation with muscles.
Produces blood cells in the bone marrow.
Stores minerals like calcium and phosphorus.

Types of Bones

Bones are classified into different types based on their shape:

Long Bones: Longer than they are wide, provide strength, structure, and mobility (e.g., femur, humerus).
Short Bones: Cube-shaped, provide stability and some movement (e.g., carpals in wrist, tarsals in ankle).
Flat Bones: Thin, flattened, and often curved, provide protection and broad surfaces for muscle attachment (e.g., skull bones, sternum, ribs).
Irregular Bones: Have complex shapes that do not fit other categories, provide protection and muscle attachment (e.g., vertebrae, hip bones).
Sesamoid Bones: Small, round bones embedded in tendons, protect tendons from stress and wear (e.g., patella/kneecap).

Definition of Joints

A joint is a point where two or more bones meet. Joints allow movement and provide flexibility to the skeletal system.

Kinds of Joints

Joints are generally classified by the amount of movement they allow:

Fixed/Immovable Joints (Synarthroses): Do not allow any movement (e.g., sutures in the skull).
Slightly Movable Joints (Amphiarthroses): Allow limited movement (e.g., joints between vertebrae, pubic symphysis).
Freely Movable Joints (Diarthroses/Synovial Joints): Allow a wide range of movement. These are further divided into types based on their shape and movement:
- Ball and Socket Joint: Allows movement in all directions (e.g., shoulder, hip).
- Hinge Joint: Allows movement in one plane, like a door hinge (e.g., elbow, knee, fingers).
- Pivot Joint: Allows rotation around an axis (e.g., neck/atlas and axis vertebrae).
- Gliding/Plane Joint: Allows bones to slide past each other (e.g., wrist, ankle).
- Condyloid Joint: Allows angular movement but no rotation (e.g., wrist joint between radius and carpals).
- Saddle Joint: Allows back-and-forth and side-to-side movement, but limited rotation (e.g., thumb).

Main Parts of the Human Skeleton

The human skeleton is divided into two main parts:

Axial Skeleton: Consists of the bones of the head (skull), neck (cervical vertebrae), trunk (ribs, sternum, thoracic and lumbar vertebrae, sacrum, coccyx).
Appendicular Skeleton: Consists of the bones of the limbs (arms and legs) and the girdles that attach them to the axial skeleton (pectoral/shoulder girdle and pelvic/hip girdle).

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 and reviews the previous lesson. The teacher then asks pupils what gives their body shape and allows them to stand upright. The teacher introduces the topic, “The Skeletal System.”
Pupils’ Activity: Pupils respond to questions and listen attentively to the introduction of the new topic.
Learning Point: Pupils connect prior knowledge to the new topic and understand the basic concept of body support.

Step 2: Definition of Skeletal System and its Functions

Time: 7 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher defines the skeletal system using simple language and explains its main functions, referring to charts or diagrams. The teacher writes key points on the board.
Pupils’ Activity: Pupils listen, ask questions for clarification, and take notes from the board.
Learning Point: Pupils understand what the skeletal system is and its roles in the body.

Step 3: Types of Bones

Time: 7 minutes
Teaching Skill: Classification/Illustration
Teacher’s Activity: The teacher discusses the different types of bones (long, short, flat, irregular, sesamoid) with examples for each. The teacher uses diagrams or a model skeleton to point out examples.
Pupils’ Activity: Pupils observe the diagrams/model, identify the different bone types, and note down examples.
Learning Point: Pupils can differentiate between various types of bones based on their shape.

Step 4: Definition of Joints

Time: 6 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher defines a joint as the meeting point of two or more bones and explains its significance for movement. The teacher asks pupils to identify some joints in their own bodies.
Pupils’ Activity: Pupils listen, identify joints on their bodies, and contribute to the discussion.
Learning Point: Pupils understand the definition and purpose of joints.

Step 5: Kinds of Joints

Time: 7 minutes
Teaching Skill: Classification/Demonstration
Teacher’s Activity: The teacher explains the different kinds of joints (fixed, slightly movable, freely movable) and demonstrates the movements allowed by various freely movable joints (e.g., hinge, ball and socket, pivot) using a model or by demonstrating on themselves.
Pupils’ Activity: Pupils observe the demonstrations, practice identifying the kinds of joints, and list examples.
Learning Point: Pupils can classify joints based on their movement and provide examples.

Step 6: Identification and Labeling of Main Parts of the Skeleton

Time: 8 minutes
Teaching Skill: Visual Aid/Practical Activity
Teacher’s Activity: The teacher displays a large diagram or a model of the human skeleton. The teacher points out and names the major bones and divisions (axial and appendicular skeleton). The teacher guides pupils to start drawing and labeling a simple skeleton.
Pupils’ Activity: Pupils observe the diagram/model, participate in naming bones, and begin drawing and labeling the main parts of the skeleton in their notebooks.
Learning Point: Pupils can identify and correctly label the main parts of the human skeleton.

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 the skeletal system.
Mention three functions of the skeletal system.
List any three types of bones and give an example for each.
What is a joint?
State two kinds of freely movable joints with examples.

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, emphasizing the importance of the skeletal system. The teacher assigns homework: “Draw and label a full human skeleton in your notebook.”
Pupils’ Activity: Pupils listen to the summary and note down their homework.
Learning Point: Pupils consolidate their understanding and prepare for further study.

Lesson Keywords

Skeletal System – The framework of bones and connective tissues that supports the body.
Bones – Hard, rigid organs that form part of the vertebrate skeleton.
Joints – Points where two or more bones meet, allowing movement.
Cartilage – A flexible connective tissue found in joints and other parts of the body.
Ligaments – Fibrous connective tissue that connects bones to other bones.
Tendons – Fibrous connective tissue that connects muscles to bones.
Axial Skeleton – Bones of the head and trunk.
Appendicular Skeleton – Bones of the limbs and their girdles.

Differentiation

For pupils who are struggling, the teacher will provide simplified diagrams and focus on identifying only the major bones and types of joints. For advanced pupils, the teacher will encourage them to research specific bone diseases or more complex joint structures and present their findings to the class.

Note for teachers using this lesson plan

Ensure that visual aids are clear and large enough for all pupils to see. Encourage active participation by asking open-ended questions and allowing pupils to feel and move their own joints to understand the concepts better. A real or replica skeleton is highly beneficial for this lesson.