Class: Junior Secondary School 3 (JSS 3 / JS3)
Term: Third Term
Week: 3
Age: 14 years
Duration: 45 minutes
Subject: Basic Science and Technology
Curriculum Theme: Computer Studies / Information Technology
Previous Lesson: Source of Viruses: Infected Diskettes.
Topic: VIRUS WARNING SIGNS
Subject Matter: Delay in response, Presence of tiny dots, Wandering across the screen, Incomplete saving of file, Corruption of the system set up instructions: Appearance of strange characters.

Specific Objectives

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

Cognitive Domain:

Define a computer virus in simple terms.
Identify at least three common warning signs of a computer virus.

Affective Domain:

Appreciate the importance of recognizing virus warning signs.
Develop a cautious attitude towards computer usage to prevent virus infection.

Psychomotor Domain:

Explain how to identify specific virus warning signs on a computer.
Suggest basic steps to take when a virus warning sign is observed.

Discuss with peers the potential impact of computer viruses on data and system performance.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum
State Unified Scheme of Work
Basic Science and Technology for Junior Secondary Schools Book 3.
https://www.google.com/search?q=JSS3+computer+virus+warning+signs
https://www.youtube.com/results?search_query=computer+virus+warning+signs+explanation

Instructional Materials

The teacher will teach this lesson with the aid of:

Charts illustrating various computer virus warning signs.
Posters displaying images of corrupted files or strange characters.
Video clips demonstrating computer behavior affected by viruses.
A computer system (if available) to show examples.

Rationale for the Lesson

This lesson helps pupils understand the common signs that indicate a computer might be infected with a virus. Recognizing these signs early enables pupils to take appropriate action, protecting their computers and data from severe damage or loss.

Prerequisite/Previous Knowledge

Pupils have basic knowledge of what a computer is and how to perform simple operations on it.

Lesson Content/Board Summary

VIRUS WARNING SIGNS

What is a Computer Virus?

A computer virus is a type of malicious software program that, when executed, replicates itself by modifying other computer programs and inserting its own code. When this replication succeeds, the affected areas are then “infected” with a computer virus.

Common Warning Signs of Computer Viruses

The following are common indications that a computer may be infected with a virus:

Delay in Response: The computer becomes unusually slow to respond to commands, open programs, or perform tasks.
Presence of Tiny Dots: Strange, tiny dots or patterns appear randomly on the screen that were not there before.
Wandering Across the Screen: The mouse pointer or cursor moves by itself across the screen without user input.
Incomplete Saving of File: Files fail to save completely, or corrupted versions of saved files are found.
Corruption of System Setup Instructions / Appearance of Strange Characters: System settings change without permission, or unusual and unreadable characters appear in files, folders, or during startup.
Frequent Pop-ups: Unwanted advertisements or error messages frequently appear on the screen.
Missing Files or Programs: Files or programs disappear from the computer without being deleted by the user.

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, reviews the previous lesson briefly, and then asks questions like, “Have you ever experienced your computer behaving strangely?” or “What problems have you encountered while using a computer?”
Pupils’ Activity: Pupils respond to the teacher’s questions and share their experiences.
Learning Point: Pupils are introduced to the topic and relate it to their experiences.

Step 2: Explanation of Computer Virus

Time: 7 minutes
Teaching Skill: Explanation
Teacher’s Activity: The teacher explains what a computer virus is using simple terms and an analogy (e.g., a biological virus affecting the human body).
Pupils’ Activity: Pupils listen attentively and ask questions for clarification.
Learning Point: Pupils understand the basic concept of a computer virus.

Step 3: Discussion of Delay in Response and Tiny Dots

Time: 7 minutes
Teaching Skill: Demonstration/Visual Aid
Teacher’s Activity: The teacher explains “Delay in Response” and “Presence of Tiny Dots” as virus warning signs, using charts and possibly a video clip to demonstrate.
Pupils’ Activity: Pupils observe the charts and video, take notes, and ask questions.
Learning Point: Pupils learn two key warning signs of a computer virus.

Step 4: Discussion of Wandering Across Screen and Incomplete Saving

Time: 7 minutes
Teaching Skill: Explanation/Illustration
Teacher’s Activity: The teacher explains “Wandering Across the Screen” and “Incomplete Saving of File” as virus warning signs, using posters and practical examples.
Pupils’ Activity: Pupils listen, observe, and discuss how these signs might appear.
Learning Point: Pupils understand two more warning signs related to cursor movement and file operations.

Step 5: Discussion of Corruption and Strange Characters

Time: 7 minutes
Teaching Skill: Explanation/Visual Aid
Teacher’s Activity: The teacher explains “Corruption of System Setup Instructions” and “Appearance of Strange Characters,” showing examples on charts or through a video.
Pupils’ Activity: Pupils observe and learn how system corruption and strange characters indicate a virus.
Learning Point: Pupils learn about advanced signs of virus infection affecting system integrity.

Step 6: Class Activity/Discussion

Time: 5 minutes
Teaching Skill: Group Discussion
Teacher’s Activity: The teacher divides pupils into small groups to discuss which virus warning signs they have observed or heard about, and what they think should be done.
Pupils’ Activity: Pupils engage in group discussions and share their findings with the class.
Learning Point: Pupils consolidate their understanding through peer interaction and practical application.

Step 7: Evaluation/Review

Time: 5 minutes
Teaching Skill: Questioning/Assessment
Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

What is a computer virus?
Mention three common warning signs that a computer might be infected with a virus.
Explain “delay in response” as a virus warning sign.
What should you do if your computer starts showing strange characters?

Pupils’ Activity: Pupils answer orally and in writing.
Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 2 minutes
Teaching Skill: Summarization
Teacher’s Activity: The teacher summarizes the key points of the lesson, emphasizing the importance of recognizing virus warning signs. The teacher assigns homework for pupils to research ways to prevent virus infection.
Pupils’ Activity: Pupils listen to the summary and copy down the homework.
Learning Point: Pupils recap the lesson and are encouraged to learn more about virus prevention.

Lesson Keywords

Computer virus – A malicious program that infects computers.
Warning signs – Indicators that something is wrong.
Delay in response – Computer takes unusually long to perform tasks.
Strange characters – Unreadable symbols appearing on the screen or in files.
Corruption – Damage to files or system settings.

Differentiation

For pupils who are struggling, the teacher will provide simplified explanations and more visual aids, focusing on just two or three common warning signs. For advanced learners, the teacher will encourage them to research different types of viruses and their specific symptoms, or discuss basic antivirus measures.

Note for teachers using this lesson plan

Encourage pupils to share their own experiences with computer issues to make the lesson more relatable. Use real-world examples and keep the language simple and direct. Practical demonstrations of computer behavior (e.g., a slow computer simulation or a video of a wandering cursor) will greatly enhance understanding. Emphasize that early detection of these signs can prevent greater damage.