System Development

Subject Area: Technology
Curriculum Area: Information Technology – System Development
Grade Level: 11th Grade
Time: 30 minutes
Class Size: 6 students
Country Standard: CA Education Standards

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Lesson Objectives

By the end of this lesson, students will be able to:

1. Define what a system is and describe its basic elements.
2. Differentiate between manual systems and computer-based information systems (CBIS).
3. Understand the System Development Life Cycle (SDLC) and its models (Waterfall and Iterative).
4. Explain all SDLC phases and identify four types of testing and four deployment methodologies.

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Materials Needed

• Whiteboard/Smartboard
• Markers or digital tools (if online teaching)
• Handouts (printed or digital) outlining the key content
• A flowchart of SDLC
• Case study example (e.g., developing a library management system)

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Lesson Plan Structure

1. Introduction (5 Min)

Activity: Quick Warm-Up Discussion

1. Write the question "What do you think a system is?" on the board.
2. Ask students for a few examples (e.g., traffic lights, ATM systems). Use these examples to introduce the definition of a system.

Definition:
A system is an organised collection of elements working together to achieve a common goal.

Basic Elements of a System:
Briefly explain the elements:

• Input: Data collected (e.g., depositing money at an ATM).
• Process: Transformation of the input (e.g., storing the amount in the account).
• Output: Result or outcome (e.g., account balance updated).
• Feedback: Adjustments and improvements (e.g., correcting errors in transactions).

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2. Manual vs. Computer-Based Systems (5 Min)

Activity: Scenario Comparison

1. Present two scenarios:
   • A librarian managing a library manually using pen and paper.
   • A librarian using library management software on a computer.

Discussion Questions:
a. What are the challenges of the manual system?
b. Identify the benefits of transitioning to a computer-based information system.

Key Points to Highlight:

• A Manual Information System uses human effort; it is prone to errors, slower, and requires physical storage (e.g., paper records).
• A Computer-Based Information System (CBIS) uses technology to store, process, and retrieve data, offering efficiency, automation, and the ability to handle large volumes of data.

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3. Exploring SDLC (10 Min)

Activity: SDLC Flowchart and Step-by-Step Explanation

What is SDLC?
The System Development Life Cycle (SDLC) is a structured process for planning, creating, testing, and deploying information systems.

Steps of SDLC Using Waterfall Model:

1. Planning:

   • Define the problem and objectives.
   • Example: School management needs a system for tracking attendance.

2. Analysis:

   • Document requirements.
   • Example: What features will the system need (e.g., automatic reports, data entry for teachers)?

3. Design:

   • Create the blueprint of the system, including UI and database design.

4. Implementation:

   • Build the system through coding.

5. Testing and Integration:

   • Conduct four types of testing:
     a. Unit Testing – Focus on individual components.
     b. Integration Testing – Ensure components work together.
     c. System Testing – Test the entire system for bugs.
     d. Acceptance Testing – Test for user satisfaction.

6. Maintenance:

   • Regular updates and fixes.

Iterative Model Key Difference:

• Unlike the linear Waterfall Model, the Iterative Model repeats phases to continually refine the system, making it adaptable to changes.

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4. Deployment Methods (5 Min)

Activity: Think-Pair-Share

Ask: "How would you deliver the finished system to users? Which of these options would work best and why?"

Explain:

1. Direct (Big Bang): The old system is completely replaced with the new one at once.
2. Parallel: Run both old and new systems side by side temporarily.
3. Phased: Implement the system in stages.
4. Pilot: Introduce to a small group first before full deployment.

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5. Application and Wrap-Up (5 Min)

Activity: Mini-Case Study

• Scenario: The school library is moving from a manual system to a CBIS.
• Ask: "Using SDLC and what you've learned, how would you approach this system development project? Include steps, testing, and deployment."

Group Wrap-Up Discussion:

• Summarise the basic difference between manual and computer systems.
• Identify key phases of SDLC and their importance.
• Reiterate the importance of proper testing and deployment methods.

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Assessment/Homework

In-Class Assessment:

• Each student explains one step of SDLC or identifies one deployment/testing method.

Homework:

• Write a 150-word analysis on: "What are the advantages of using CBIS over manual systems?"

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Teaching Note

This lesson employs interactive techniques like real-world examples, structured discussions, and visual aids to engage Year 11 students. Breaking down otherwise complex topics (SDLC & system comparisons) into relatable, bite-sized pieces is key to helping students truly understand technological concepts.