Class: Primary 4
Term: 3rd Term
Week: 5
Age: 9 years
Duration: 40 minutes
Subject: Basic Science & Technology
Curriculum Theme: Basic Science
Previous Lesson: Water Cycle – Dew
Topic: Water – Chemical Composition

Content/Learning Area

  • Chemical composition of water
  • Chemical formula of water: H2O
  • Hydrogen and Oxygen

Performance Objectives

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

  • Cognitive Domain: Understand the chemical composition and formula of water.
  • Affective Domain: Appreciate the importance of water in daily life and its unique composition.
  • Psychomotor Domain: Identify and write the chemical formula of water.
  • Social Domain: Discuss the significance of water’s composition with peers.

Reference Materials

The following resources were used in planning this lesson:

  • 9 – Years Basic Education Curriculum
  • Abuja Educational Resource Centre Scheme of work
  • NAPPS National Unified Scheme of Work
  • Online Information from Water’s Compositions | Idaho Falls, ID
  • Relevant Textbooks

Instructional Materials

The teacher will teach this lesson with the aid of:

  • Whiteboard and markers
  • Models of water molecules
  • Interactive slides on the chemical composition of water

Rationale for the Lesson

Understanding the chemical composition of water is crucial for grasping fundamental scientific concepts and appreciating water’s role in our lives and the environment.

Prerequisite/Previous Knowledge

Pupils are expected to have a basic understanding of water and its forms from the previous lesson on the water cycle.


Learning Area: Water – Chemical Composition

To deliver this lesson, the teacher will adopt the following steps:

Content DevelopmentTimeTeaching MethodTeaching StrategyTeacher’s ActivityPupil’s ActivityLearning Point
Step 1: Introduction5 minDirect TeachingQuestion and AnswerIntroduce the topic, ask what pupils know about waterRespond to questions, engage in discussionSetting the stage for new information
Step 2: Explaining Chemical Composition10 minLectureVisuals and ExplanationExplain H2O, hydrogen, and oxygen, use visual aidsListen and observeUnderstanding water’s chemical makeup
Step 3: Writing the Chemical Formula10 minDemonstrationGuided PracticeWrite H2O on the board, explain the ratio 2:1Write down notes, copy the formulaLearning to express water chemically
Step 4: Group Discussion5 minGroup WorkCollaborative LearningFacilitate a discussion on why water is importantDiscuss in groups, share thoughtsSocial interaction on the topic
Step 5: Note Taking5 minWritingIndividual ActivityInstruct pupils to summarize their learning in notesWrite individual summariesConsolidating knowledge
Step 6: Evaluation5 minQuestioningReviewAsk questions about the day’s lessonAnswer questions, demonstrate understandingAssessing understanding
Conclusion5 minSummaryRecapSummarize key points, preview the next lessonListen and ask final questionsClosure and recap of the lesson

Classroom Note

Chemical Composition of Water

Water is a compound consisting of hydrogen and oxygen chemically bonded together. Like other compounds, the smallest particles of water are called molecules. Each molecule of water contains two atoms of hydrogen and one atom of oxygen.[1]

Chemical Formula of Water

chemical composition of water is shown in its formula "H2O"
Credits: Flexi answers

The chemical formula of water is H2O. The “H” stands for hydrogen and “O” for oxygen. The ratio of hydrogen to oxygen in water is 2:1, It shows us that each molecule of water consists of two hydrogen atoms bonded to one oxygen atom. The number ‘2’ next to hydrogen in H2O tells us there are two hydrogen atoms for every one oxygen atom.

Lesson Evaluation

To evaluate the learning, the teacher asks pupils to:

  1. What is the chemical formula of water?
  2. Name the two elements that make up water.
  3. Explain why the chemical formula of water is H2O.
  4. How many hydrogen atoms are there in one molecule of water?

Note for teachers using my lesson plan:

Hi there, remember that I didn’t make this lesson plan with any particular class or teacher in mind and I tried as much as possible with my experience and expertise to deliver this plan in a standard and effective style utilizing the best strategy and methods. Nevertheless, you are free to customize the lesson content, teaching methods, timing, and pupil activities to suit your teaching style, pupils’ comprehension, curriculum, and resources available to you. Happy teaching!

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Last Update: April 25, 2024