• Class: Primary 3
  • Term: 2nd Term
  • Week: 9
  • Age: 8 years
  • Period:
  • Duration: 40 minutes
  • Date:
  • Subject: Basic Science Technology
  • Curriculum Theme: Computer Studies
  • Topic: Components Of A System Unit
  • Content: Random Access Memory (RAM) And Control Unit (CU)

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

  • Cognitive Domain: Define Random Access Memory (RAM) and list 2 uses of RAM.
  • Define Control Unit (CU) and list 2 uses of Control Unit (CU)
  • Affective Domain: Appreciate the importance of RAM and Control Unit in a computer system.
  • Psychomotor Domain: Identify the physical location of RAM and Control Unit in a system unit.
  • Social Domain: Participate actively in group discussions about the topic.

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:

  • Diagrams of a system unit
  • Charts explaining RAM and Control Unit
  • Sample RAM and Control Unit (if available)
  • Marker board and markers

Rationale for the Lesson:
Understanding the components of a system unit, specifically RAM and Control Unit, is crucial for basic computer literacy. It lays the foundation for understanding how computers function.

Prerequisite/Previous Knowledge:
Students should have a basic understanding of what a computer is and its general components.


Content Development: Random Access Memory (RAM) And Control Unit (CU)

ContentTimeTeaching MethodTeaching StrategyTeacher’s ActivityPupils’ ActivityLearning Point
Introduction5 minsDiscussionQuestion and AnswerAsk questions to elicit prior knowledge.Respond to questions and share what they know.Establishing a connection with prior knowledge.
Definition 10 minsExplanationDirect InstructionDefine Random Access Memory (RAM) and Control Unit (CU).Listen and take notes.Understanding the meanings of RAM and Control Unit.
Uses of RAM 5 minsDemonstrationPractical DemonstrationShow examples of RAM uses (e.g., running applications).Observe and discuss examples.Identifying practical uses of Random Access Memory (RAM).
Uses of Control Unit 5 minsDemonstrationPractical DemonstrationShow examples of Control Unit uses (e.g., managing instructions).Observe and discuss examples.Identifying practical uses of the Control Unit (CU).
Social Activity 5 minsGroup DiscussionCollaborative LearningDivide into groups, discuss and list 2 uses of RAM and CU.Discuss and list uses in groups.Enhancing social interaction and collaborative learning.
Note Taking 5 minsWriting Guided PracticeSummarize key points on the board for note-taking.Take notes from the board.Recording essential information about RAM and Control Unit.
Evaluation3 minsQuestion and AnswerIndividual QuestioningAsk questions related to the specific objectives.Answer questions individually.Assessing understanding of the topic.
Conclusion 2 minsRecapReview and ReinforcementSummarize the lesson, emphasize key points.Share what they’ve learned.Reinforcing understanding of RAM and Control Unit.

Classroom Note:

Random Access Memory (RAM)

Random Access Memory, commonly known as RAM, is a type of computer memory that is used to store data that is actively being used or processed by a computer at any given time.

Uses Of RAM

  1. Running applications
  2. Multitasking
  3. Operating system functionality
  4. Temporary storage of Data
  5. Gaming performance

Control Unit (CU)

The Control Unit, often abbreviated as CU, is a critical component of a computer’s central processing unit (CPU). It manages and directs the operations of the entire CPU, ensuring that data and instructions are processed in the correct sequence and at the right time.

Uses Of CU

  1. Instruction execution
  2. Coordination of data movement
  3. Arithmetic and logic operations (Calculations)
  4. Clock signal


  1. What is the role of Random Access Memory (RAM) in a computer system?
  2. List two uses of the Control Unit (CU) in a computer.

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