• Class: Primary 3
  • Term: 2nd Term
  • Week: 4
  • Age: 8 years
  • Period:
  • Duration: 40 minutes
  • Date:
  • Subject: Basic Science Technology
  • Curriculum Theme: Computer Studies
  • Topic: System Unit
  • Content: Definition And Functions Of A System Unit

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

  • Cognitive Domain: Define a system unit and List 5 functions of a system unit.
  • Affective Domain: Appreciate the importance of a system unit in a computer.
  • Psychomotor Domain: Demonstrate the assembly of basic computer parts.
  • Social Domain: Participate in a group discussion about the significance of computer components in daily life.

Reference Materials:

  • 9 – Years Basic Education Curriculum
  • Abuja Educational Resource Centre Scheme of work
  • NAPPS National Unified Scheme of Work
  • Online Information
  • Textbooks

Instructional Materials:

  • Computer system unit
  • Pictures of computer components
  • Chart illustrating functions of a system unit
  • Whiteboard and markers
  • Flashcards

Rationale for the Lesson:
Understanding the system unit is crucial for pupils as it forms the foundation of computer knowledge. It helps them comprehend the functionalities of computer components and their significance in daily life.

Prerequisite/Previous Knowledge:
Students should have basic knowledge of computer parts.


Content Development: System Unit

ContentTimeTeaching MethodTeaching StrategyTeacher’s ActivityPupils’ ActivityLearning Point
Introduction 5 minsDiscussionQuestion and AnswerInitiate a discussion about computers, asking what they know.Respond to questions and share existing knowledge.Understand the relevance of computers in daily life.
Definition and Functions 10 minsExplanationDirect InstructionDefine a system unit. Discuss and list 2 functions.Listen and take notes.Define a system unit and list 2 functions.
Group Activity 5 minsGroup DiscussionCooperative LearningDivide into groups, provide pictures, and ask to list more functions.Discuss and compile a list of functions.List additional functions of a system unit.
Demonstration 5 minsDemonstrationInquiry-based LearningShow computer parts, demonstrate their assembly, emphasizing the system unit.Observe and ask questions.Understand the physical structure of a system unit.
Group Discussion5 minsGroup DiscussionCollaborative LearningFacilitate a group discussion about how computer components are used daily.Discuss and share thoughts in groups.Understand the practical applications of computer components.
Note Taking 5 minsWriting Direct InstructionSummarize key points on the whiteboard for note-taking.Take notes from the whiteboard.Summarize the definition and functions of a system unit.
Evaluation 2 minsQuestion and AnswerCritical ThinkingAsk questions related to the specific objectives.Answer questions individually.Assess understanding of the topic.
Conclusion 3 minsRecapReviewRecap the importance of a system unit. Review key learnings.Share reflections on the importance of computer components.Reinforce understanding of the lesson.

Classroom Note:

System Unit

A system unit is an essential part of a computer. It is responsible for coordinating and managing various computer components. It acts as the brain of the computer.

Functions of a System Unit

  1. Processing Data: The system unit processes information entered into the computer.
  2. Storage: It stores data and instructions for the computer to access later.
  3. Communication: The system unit facilitates communication between different computer parts.
  4. Power Supply: It provides power to all components of the computer.
  5. Control: The system unit controls and manages the overall functioning of the computer.


  1. What is the definition of a system unit?
  2. List three functions of a system unit.

Note to Teachers:
Customize the lesson content, teaching methods, and pupil activities to suit your teaching style, curriculum, and available resources.

Categorized in:

Lesson Notes,

Last Update: January 9, 2024