Year Group

Year 9

Duration

60 minutes

Class Size

30 students

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Curriculum Links

This lesson aligns with the National Curriculum for Computing (England) for Key Stage 3, specifically:

• Computing: National Curriculum Programme of Study – KS3
  • Use two or more networks, including the internet, to communicate and collaborate remotely, including at least one public and one private network
  • Understand different networks, including the internet, and the opportunities they offer for communication and collaboration
  • Understand how data is transferred and secured on a network

(DfE, 2014)

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Learning Objectives

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

• Define what a computer network is and explain its purpose.
• Differentiate between types of networks (LAN, WAN) with examples.
• Describe basic network components (e.g., routers, switches, servers).
• Explain the importance of network protocols in data transfer.
• Demonstrate understanding of network usage in everyday life.

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Resources

• Interactive whiteboard or projector
• Computer or tablet for each pair of students
• Printed worksheet with diagrams of network types
• Pre-prepared PowerPoint slides with visuals and definitions
• Network simulation tool (offline or web-based) for practical activity (e.g., simulated local network setup)
• Quiz sheet (paper or digital) for assessment
• Sticky notes and flip chart for group activity

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Lesson Structure

1. Introduction (I DO) – 15 minutes

Activity:

• Start with an engagement question: "How do you think your computer talks to other computers or devices around you?"
• Present a short animated video or interactive slide illustrating communication between devices (smartphones, laptops at school, etc.).
• Define a network: "A network is a group of two or more connected computers or devices that share resources and information."
• Show and explain the two main types of networks: LAN (Local Area Network) and WAN (Wide Area Network), with real-life examples such as school network vs. the internet.
• Introduce basic components: router, switch, server, client devices. Use labelled diagrams.
• Introduce the term protocols (e.g., TCP/IP) and their role in standardising communication.

Teacher’s actions:

• Use clear visuals and real-world analogies (e.g., post office for data transfer).
• Demonstrate using a simple network diagram on the board.
• Use questioning techniques to check understanding and keep engagement high.

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2. Guided Practice (WE DO) – 20 minutes

Activity 1: Network diagram sorting (10 mins)

• Hand out printed worksheets with mixed diagrams representing LANs, WANs, devices, and labels.
• In pairs, students discuss and classify network types and match components with their function.
• Teacher circulates, facilitating discussion and correcting misconceptions.

Activity 2: Network simulation (10 mins)

• Using computers/tablets, pairs use a network simulation tool to visually create a simple LAN by connecting devices and a router.
• Students explore how devices communicate and observe simulated data flow.
• Teacher guides students to change connections and observe how network topology affects communication.

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3. Independent Practice (YOU DO) – 15 minutes

Task: Real-world network research and presentation

• Individually, students write a short paragraph answering:
  • "Describe a network you use daily (home Wi-Fi, school network, mobile data) and explain how it helps you."
• Ask students to create a simple labelled diagram of their described network on paper, including at least three components.
• Encourage creativity: students can use drawings, symbols, or colour coding.
• Extension: Write one sentence about why security might be important on their network.

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4. Plenary and Assessment – 10 minutes

Quiz/Discussion

• Conduct a quick quiz with multiple-choice and short answer questions covering:
  • Network definition
  • Difference between LAN and WAN
  • Naming key components (router, server, switch)
  • Purpose of network protocols
• Use mini whiteboards or quiz sheets for individual answers.
• Share answers collectively, clarifying misunderstandings.

Exit ticket (formative assessment):

• Each student writes down on a sticky note:
  • One thing they learned
  • One question they still have
• Collect and review to inform next lessons.

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Differentiation:

• Support: Visual aids, labelled diagrams, peer support in pairs.
• Challenge: Encourage more detailed technical vocabulary and exploration of how networks handle data security and privacy.

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Cross-Curricular Connections

• Maths: Use of logic in understanding how data routes through networks.
• English: Structured writing in the independent task helps improve technical communication skills.

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Reflection and Next Steps

• Use exit tickets to identify areas needing reteaching.
• Plan next lesson around Network Security or Data Transmission and Protocols building on today’s foundations.
• Consider incorporating a practical project where students build mini networks with physical hardware or simulators.

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This structured lesson plan leverages the 'I DO, WE DO, YOU DO' model effectively, embedding core National Curriculum objectives with engaging, hands-on activities that deepen student understanding of the critical concept of networks in computing.