Life cycles of insects and other animals for Primary 4

Class: Primary Four
Term: First Term
Week: 7
Age: 9 years
Duration: 45 minutes
Subject: Basic Science and Technology
Curriculum Theme: Our Environment
Focal competence: Interpreting animal development using diagrams/models for effective communication
Key competencies/values: Communication; Creativity and Innovation
Skills:

• Recording changes in animals
• Analysing and interpreting observations
• Drawing and labelling life cycles of common animals

Previous Lesson: Growth and developmental changes in animals
Topic: Growth And Developmental Changes In Animals: Life Cycles
Subject Matter: Life cycles of insects and other animals, drawing and labelling common life cycles

Specific Objectives

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

Cognitive Domain

• Identify the different stages in the life cycle of a butterfly/housefly and a frog.

Psychomotor Domain

• Draw the life cycle of a common animal, such as an insect (butterfly/housefly) or a frog.
• Label the stages of the life cycle correctly.

Affective Domain

• Appreciate the developmental changes animals undergo.

Reference Materials

The following resources were used in planning this lesson:

• 2025 Revised 9 Years Basic Education Curriculum
• Relevant State Unified Scheme of Work
• Basic Science and Technology for Primary 4 textbook
• The HeadTeacher Scheme of work

Instructional Materials

The teacher will teach this lesson with the aid of:

• Pictures of animals (butterfly, housefly, frog)
• Picture cards or models showing the stages of a butterfly/housefly life cycle
• Picture cards or models showing the stages of a frog life cycle
• Drawing books/sheets
• Pencils and crayons
• Recording book
• School surroundings (for observation, if animals are present)
• Digital resources (videos or interactive diagrams of life cycles)

Rationale for the Lesson

This lesson helps pupils understand that animals grow and change through different stages, which is essential for comprehending the natural world. Learning about life cycles fosters observation skills and an appreciation for biodiversity. It also provides a foundation for understanding ecological concepts and animal development.

Prerequisite/Previous Knowledge

Pupils should have basic knowledge of different types of animals and some of their characteristics. They should also be familiar with simple drawing and labelling.

Lesson Content/Board Summary

Growth And Developmental Changes In Animals: Life Cycles

A life cycle describes the series of changes that an animal undergoes from the beginning of its life until it produces its own kind. Animals grow and change in different stages.

Life Cycle of a Butterfly (or Housefly)

Insects like butterflies and houseflies go through a complete metamorphosis, which means they have four distinct stages:

1. Egg: The life cycle begins when an adult butterfly lays tiny eggs, usually on a leaf.
2. Larva (Caterpillar): The egg hatches into a larva, which is a caterpillar for a butterfly. The larva eats a lot and grows quickly, shedding its skin several times.
3. Pupa (Chrysalis): The larva then changes into a pupa. For a butterfly, this stage is called a chrysalis. During this stage, the insect is inactive but undergoes major changes inside.
4. Adult: Finally, the pupa transforms into an adult butterfly, which emerges, flies, mates, and lays eggs to start the cycle again.

Life Cycle of a Frog

Frogs go through a process called metamorphosis, changing from an aquatic form to a terrestrial adult. Their life cycle typically has these stages:

1. Eggs: Adult female frogs lay eggs in water, often in a jelly-like cluster called frogspawn.
2. Tadpole: The eggs hatch into tadpoles, which are aquatic larvae with gills for breathing underwater and a tail for swimming. Tadpoles feed on algae.
3. Tadpole with Legs: As the tadpole grows, it develops hind legs, then front legs. Its tail starts to shrink, and lungs begin to develop for breathing air.
4. Froglet: The tadpole loses its tail completely and becomes a froglet, which can live both in water and on land.
5. Adult Frog: The froglet grows into an adult frog, which lives mostly on land but returns to water to lay eggs and repeat the cycle.

Teaching Methods/Instructional Techniques

Discussion, Demonstration, Guided Practice, Question and Answer, Explanation, Observation, Drawing Activity, Sequencing Activity.

Instructional Procedures

Step 1: Introduction

Time: 5 minutes

Teaching Skill: Questioning/Activating prior knowledge

Teacher’s Activity: The teacher greets the pupils and asks them if they have noticed how some animals change as they grow. The teacher shows pictures of a chick and a hen, asking how they are related. Then, the teacher introduces the topic of life cycles.

Pupils’ Activity: Pupils respond to questions and share their observations about animal growth. They listen attentively to the introduction.

Learning Point: Introduction to life cycles

Step 2: Explanation of Life Cycle Concept

Time: 7 minutes

Teaching Skill: Explanation/Demonstration

Teacher’s Activity: The teacher explains what a life cycle is, using simple language. The teacher uses picture cards or models to show a general idea of how animals change from birth to adulthood, emphasizing that it’s a continuous cycle.

Pupils’ Activity: Pupils listen to the explanation and observe the picture cards/models.

Learning Point: Meaning of life cycle

Step 3: Life Cycle of a Butterfly/Housefly

Time: 8 minutes

Teaching Skill: Demonstration/Sequencing

Teacher’s Activity: The teacher displays picture cards or models of the butterfly/housefly life cycle. The teacher explains each stage (egg, larva/caterpillar, pupa/chrysalis, adult) and guides pupils to sequence them correctly on the board.

Pupils’ Activity: Pupils observe the pictures, listen to the explanation, and participate in sequencing the stages of the butterfly/housefly life cycle.

Learning Point: Butterfly/housefly life cycle stages

Step 4: Life Cycle of a Frog

Time: 8 minutes

Teaching Skill: Demonstration/Explanation

Teacher’s Activity: The teacher displays picture cards or models of the frog life cycle. The teacher explains each stage (eggs, tadpole, tadpole with legs, froglet, adult frog) and guides pupils to sequence them correctly.

Pupils’ Activity: Pupils observe the pictures, listen to the explanation, and participate in sequencing the stages of the frog life cycle.

Learning Point: Frog life cycle stages

Step 5: Guided Drawing of a Life Cycle

Time: 5 minutes

Teaching Skill: Guided practice/Drawing instruction

Teacher’s Activity: The teacher guides pupils to draw the life cycle of either a butterfly or a frog in their drawing books. The teacher provides simple drawing steps or outlines on the board.

Pupils’ Activity: Pupils follow the teacher’s guidance to draw the chosen life cycle in their books.

Learning Point: Drawing animal life cycles

Step 6: Labelling the Life Cycle Stages

Time: 3 minutes

Teaching Skill: Labelling/Verification

Teacher’s Activity: After drawing, the teacher guides pupils to correctly label each stage of the life cycle they have drawn. The teacher moves around to check their work and offer assistance.

Pupils’ Activity: Pupils label the stages of their drawn life cycle correctly.

Learning Point: Labelling life cycle stages

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

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

1. What is a life cycle?
2. Mention two stages in the life cycle of a butterfly.
3. Mention two stages in the life cycle of a frog.
4. Draw and label the life cycle of a frog.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Understanding life cycles

Step 8: Note-Taking

Time: 4 minutes

Teaching Skill: Guided Writing

Teacher’s Activity: The teacher guides pupils to copy the essential Board Summary notes on the life cycles of the butterfly/housefly and frog into their notebooks.

Pupils’ Activity: Pupils/students copy the notes carefully into their notebooks.

Learning Point: Recording lesson notes

Step 9: Conclusion

Time: 3 minutes

Teaching Skill: Consolidation

Teacher’s Activity: The teacher summarises the lesson by reiterating that animals undergo fascinating changes throughout their lives, which is called a life cycle. The teacher encourages pupils to observe animals around them.

Pupils’ Activity: Pupils listen to the summary and ask any final questions.

Learning Point: Life cycle reinforcement

Continuous Assessment/Further Study

Type: Homework/Practice Exercise

Instruction: Observe a common insect (like an ant or mosquito) at home or in your school environment. Try to draw and label any two stages of its life cycle that you can identify. If you cannot observe, draw the life cycle of a housefly and label its stages.

1. Draw the life cycle of a housefly.
2. Label all the stages correctly.

Lesson Keywords

• Life cycle – The series of changes an animal goes through from birth to adulthood.
• Egg – The first stage of life for many animals, often laid by the parent.
• Larva – An immature form of an insect, like a caterpillar (for butterfly) or maggot (for housefly).
• Pupa – The stage between larva and adult in insects, often inactive (e.g., chrysalis).
• Tadpole – The aquatic larval stage of a frog, with gills and a tail.
• Metamorphosis – The process of transformation from an immature form to an adult form in two or more distinct stages.

Differentiation

For weaker learners: Provide pre-drawn outlines of the life cycles for them to label. Use larger, clearer picture cards and spend more time on one specific animal’s life cycle. Encourage oral responses before written ones.

For faster learners: Challenge them to draw and label the life cycles of both a butterfly and a frog. Ask them to research other animals that undergo metamorphosis and share their findings with the class.

Suggested Lesson Videos

Search on YouTube: life cycle of butterfly and frog primary 4

Teacher Guide for Using This Lesson Plan

Before the lesson, ensure you have all the necessary instructional materials, especially clear picture cards or models of the butterfly/housefly and frog life cycles. Arrange these in the correct sequence beforehand for easy demonstration. Begin by engaging pupils with questions about animal growth to activate their prior knowledge. Clearly explain the concept of a life cycle, using the visual aids to illustrate each stage. Guide pupils through the sequencing activity for both the insect and frog life cycles. During the drawing activity, provide clear, step-by-step instructions and circulate to assist pupils who may struggle. Emphasize the importance of correct labelling. The Board Summary should be copied by pupils after the evaluation to consolidate their learning. Encourage pupils to ask questions and foster a sense of wonder about the natural world. For pupils who find drawing challenging, allow them to trace or use simplified diagrams. For advanced learners, encourage them to add more details or explore other animal life cycles.