Class: Senior Secondary School 1 (SS1, SS 1, SSS1, SSS 1)
Term: First Term
Week: 1
Age: 15 years
Duration: 45 minutes
Subject: Biology
Curriculum Theme: Biology
Previous Lesson: .
Topic: RECOGNISING LIVING THINGS
Subject Matter: Characteristics of living things, differences between plants and animals, levels of organisation of life with examples

Specific Objectives

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

Cognitive Domain:

List at least five characteristics of living things.
State three differences between plants and animals.
Explain the concept of levels of organisation of life.
Give examples of different levels of organisation.

Affective Domain:

Appreciate the diversity and complexity of living organisms.
Show curiosity about the natural world through observation.

Psychomotor Domain:

Sort given items into living and non-living categories.
Record observations of living specimens accurately.

Collaborate effectively in groups to compare specimens.
Communicate their findings clearly to their peers.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Biology (Senior Secondary Education)
State Unified Scheme of Work for Biology SSS 1
Modern Biology for Senior Secondary Schools by S.T. Ramalingam

Instructional Materials

The teacher will teach this lesson with the aid of:

Living specimens (e.g., a cockroach, a potted plant, earthworms, insects)
Non-living specimens (e.g., stone, stick, plastic bottle, metal object)
Observation sheets/notebooks
Chart illustrating the characteristics of living things
Chart showing the levels of organisation of life
Marker and whiteboard/chalkboard

Rationale for the Lesson

This lesson helps pupils understand the fundamental features that define life and distinguish living things from non-living things. It also enables them to appreciate the structural complexity of organisms from simple to more complex levels, which forms the foundation for further biological studies.

Prerequisite/Previous Knowledge

Pupils have a basic understanding of living and non-living things from their Junior Secondary School science classes.

Lesson Content/Board Summary

RECOGNISING LIVING THINGS

Characteristics of Living Things

Living things are organisms that exhibit certain properties that distinguish them from non-living things. These properties are essential for survival and continuity of life.

The following are common characteristics of living things:

Movement: Change in position by the whole organism or parts of it.
Respiration: Process of releasing energy from food substances.
Nutrition: Process of obtaining and utilising food.
Irritability (Sensitivity): Ability to detect and respond to changes in the environment.
Growth: Permanent increase in size and dry mass.
Excretion: Removal of metabolic waste products from the body.
Reproduction: Process by which living things produce new individuals of their own kind.
Adaptation: Ability to adjust to changes in the environment over time.

Differences Between Plants and Animals

While both are living things, plants and animals have distinct differences:

Nutrition: Plants are autotrophic (make their own food through photosynthesis); animals are heterotrophic (obtain food from other organisms).
Movement: Most plants are stationary; most animals show locomotion (move from place to place).
Cell Wall: Plant cells have a cell wall; animal cells do not.
Growth: Plants show indeterminate growth (grow throughout life); animals show determinate growth (grow to a certain size).
Response: Plants respond slowly to stimuli; animals respond quickly.
Storage: Plants store food as starch; animals store food as glycogen.

Levels of Organisation of Life

Living things are organised in a hierarchical manner, from the simplest to the most complex structures. This organisation ensures efficiency and specialisation.

The following are the levels of organisation of life with examples:

Cells: The basic unit of life.
- Example: Red blood cell, nerve cell, root hair cell.
Tissues: A group of similar cells performing a specific function.
- Example: Muscle tissue, epidermal tissue, xylem tissue.
Organs: A group of different tissues working together to perform a specific function.
- Example: Heart, stomach, leaf, root.
Organ Systems: A group of different organs working together to perform major functions.
- Example: Digestive system, circulatory system, reproductive system.
Organism: A complete living thing made up of various organ systems.
- Example: Human being, dog, mango tree.
Population: A group of organisms of the same species living in a particular area.
- Example: A herd of elephants, a colony of ants.
Community: All the different populations living and interacting in a particular area.
- Example: All plants, animals, and microorganisms in a forest.
Ecosystem: A community of living organisms interacting with their non-living environment.
- Example: A pond ecosystem, a desert ecosystem.
Biosphere: The part of Earth where life exists, including land, water, and air.
- Example: All ecosystems on Earth.

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 their previous knowledge by asking questions like, “What is biology?” and “Can anyone give an example of a living thing and a non-living thing?” The teacher then introduces the topic: “Today, we will learn about what makes something a living thing and how plants and animals differ.”
Pupils’ Activity: Pupils respond to the teacher’s questions and listen attentively to the introduction of the new topic.
Learning Point: Pupils recall prior knowledge and are prepared for the new lesson.

Step 2: Characteristics of Living Things

Time: 10 minutes
Teaching Skill: Explanation/Demonstration
Teacher’s Activity: The teacher presents various living specimens (e.g., a cockroach, potted plant) and non-living specimens (e.g., stone, pen). The teacher guides pupils to observe and compare them, asking, “What can you see the cockroach doing that the stone cannot?” The teacher then explains and lists the main characteristics of living things on the board, using the provided chart.
Pupils’ Activity: Pupils observe the specimens, identify differences, and list characteristics of living things as guided by the teacher.
Learning Point: Pupils identify and understand the key characteristics that define living organisms.

Step 3: Differences Between Plants and Animals

Time: 10 minutes
Teaching Skill: Comparison/Discussion
Teacher’s Activity: The teacher draws two columns on the board, “Plants” and “Animals.” Using the potted plant and the cockroach as examples, the teacher facilitates a discussion, asking pupils to state observable differences between them (e.g., movement, how they get food). The teacher then summarises and adds other key differences to the board.
Pupils’ Activity: Pupils contribute to the discussion by stating differences between plants and animals and copy the summarised points into their notebooks.
Learning Point: Pupils can differentiate between plants and animals based on their unique characteristics.

Step 4: Levels of Organisation of Life

Time: 10 minutes
Teaching Skill: Explanation/Illustration
Teacher’s Activity: The teacher introduces the concept of levels of organisation, starting from the simplest (cell) to the most complex (biosphere). The teacher uses a chart to illustrate each level and provides clear examples for each, explaining how they build upon one another.
Pupils’ Activity: Pupils listen, ask questions for clarification, and take notes on the different levels of organisation and their examples.
Learning Point: Pupils understand the hierarchical structure of life from microscopic to global levels.

Step 5: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

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

List four characteristics of living things.
State three differences between plants and animals.
Mention two levels of organisation of life with an example for each.
Give one example of a living thing and one non-living thing.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 5 minutes
Teaching Skill: Summarisation/Assignment
Teacher’s Activity: The teacher summarises the key points of the lesson, reiterating the characteristics of living things, differences between plants and animals, and the levels of organisation. The teacher then assigns homework: “Draw and label a simple diagram showing at least three levels of organisation of life.”
Pupils’ Activity: Pupils listen to the summary and copy down the homework assignment.
Learning Point: The lesson is reinforced, and pupils have a take-home task to consolidate their learning.

Lesson Keywords

Movement – The ability of an organism or its parts to change position.
Respiration – The process by which living organisms release energy from food.
Nutrition – The process of taking in and utilising food for energy and growth.
Irritability – The ability of an organism to detect and respond to stimuli.
Growth – A permanent increase in the size and dry mass of an organism.
Excretion – The removal of waste products of metabolism from the body.
Reproduction – The process by which organisms produce new individuals of their own kind.
Cell – The basic structural and functional unit of all known organisms.
Tissue – A group of similar cells working together to perform a specific function.
Organ – A structure made up of different tissues working together for a specific function.
Organism – An individual living thing.

Differentiation

For struggling learners, the teacher will provide simplified charts and use more direct questioning, focusing on identifying basic characteristics and simple examples. Advanced learners will be encouraged to research and present on specific complex organ systems or the interactions within an ecosystem, fostering deeper understanding and independent learning.

Note for teachers using this lesson plan

Teachers should ensure a variety of living and non-living specimens are available for hands-on comparison. Encourage pupils to actively participate in observations and discussions. Emphasise the interconnectedness of the levels of organisation to help pupils see the bigger picture of biological systems.