What is a Computer Network?

Active learning works for this topic because Year 3 students need to see and feel how networks function, not just hear about them. Moving from abstract explanations to hands-on simulations and real-world hunts helps students connect classroom devices to their everyday experiences at school.

• Year 3
• Computing
• 3 activities
• 15 min–45 min

Learning Objectives

1. Identify the main hardware components that enable devices to connect to a network.
2. Explain the role of a router or hub in directing data between devices.
3. Analyze the path a simple message takes from one computer to another within a classroom network.
4. Compare the functions of network hardware versus data storage hardware.
5. Predict the impact on classroom work if the school network fails.

Simulation Game

⏱ 30 min·Whole Class

Simulation Game: The Human Network

Assign students roles such as 'Laptop', 'Router', and 'Printer'. Use balls of wool or string to physically connect the 'devices' to the central router, then pass a 'message' (a beanbag) from one device to another via the hub.

Prepare & details

Analyze how a message travels from one computer to another in our classroom.

Facilitation Tip: During The Human Network simulation, start with students standing in a tight circle holding hands to represent cables, then gradually widen the circle to show what happens when a connection is weak.

Setup: Flexible space for group stations

Materials: Role cards with goals/resources, Game currency or tokens, Round tracker

• Apply
• Analyze
• Evaluate
• Create
• Social Awareness
• Decision-Making

Inquiry Circle

⏱ 45 min·Small Groups

Inquiry Circle: Hardware Hunt

In small groups, students explore the classroom or school to find and photograph network hardware like Wi-Fi access points, ethernet ports, and printers. They then create a simple map showing how these items might be linked.

Prepare & details

Predict what would happen to our work if the school network stopped functioning.

Facilitation Tip: When running the Hardware Hunt, provide labelled diagrams of routers, cables, and Wi-Fi symbols so students can match real objects to their functions.

Setup: Groups at tables with access to source materials

Materials: Source material collection, Inquiry cycle worksheet, Question generation protocol, Findings presentation template

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

Think-Pair-Share

⏱ 15 min·Pairs

Think-Pair-Share: The Broken Link

Ask students to imagine the router has lost power. Partners discuss which school activities would still work (writing in a notebook) and which would stop (printing or searching the web) before sharing with the class.

Prepare & details

Differentiate between hardware that connects us and hardware that stores our data.

Facilitation Tip: Use The Broken Link Think-Pair-Share to highlight that network problems often come from missing or damaged physical parts, not just 'magic' signals.

Setup: Standard classroom seating; students turn to a neighbor

Materials: Discussion prompt (projected or printed), Optional: recording sheet for pairs

• Understand
• Apply
• Analyze
• Self-Awareness
• Relationship Skills

Teaching This Topic

Approach this topic by making the invisible visible. Use metaphors that Year 3 students understand, like a walkie-talkie network for the simulation or a spider’s web for the router’s role. Avoid overcomplicating with technical details—focus on the concept of sharing and communicating. Research shows that concrete, physical models help young learners grasp abstract ideas like connectivity and data flow.

What to Expect

Successful learning looks like students identifying key network hardware, explaining how devices communicate, and using accurate vocabulary to describe connections. They should confidently point out the router as the central organiser of a local network and predict simple breakdowns.

Watch Out for These Misconceptions

Common Misconception

During The Human Network simulation, watch for students who think the internet and a local network are the same thing. Redirect by asking them to imagine their classroom as a room and the internet as roads outside the room; then have them act out a printer working without roads.

What to Teach Instead

During the Hardware Hunt, point out the router’s cables and explain that even wireless signals travel to this physical box. Show students the back of a router to highlight the wires that make Wi-Fi possible.

Assessment Ideas

Exit Ticket

After The Human Network simulation, give students a card with a picture of a router. Ask them to write two sentences explaining its job in a school network and one thing that would stop working if it broke.

Quick Check

During the Hardware Hunt, draw a simple classroom network diagram on the board with 3 computers, a printer, and a router. Ask students to point to the device that sends messages between the computers and explain why.

Discussion Prompt

After The Broken Link Think-Pair-Share, pose the question: 'Imagine our classroom network suddenly stopped working. What are three things you would not be able to do with your computer right now, and why?' Listen for student reasoning about connectivity.

Extensions & Scaffolding

• Challenge: Ask students to design a new classroom layout for better Wi-Fi coverage and explain their choices to the class.
• Scaffolding: Provide word banks with terms like router, cable, printer, and Wi-Fi, and sentence starters for explanations.
• Deeper exploration: Introduce the idea of IP addresses by having students assign unique 'addresses' to each device in their Human Network simulation.

Key Vocabulary

Network	A group of two or more computer systems or devices linked together to share resources and communicate.
Router	A device that forwards data packets between computer networks. It acts like a traffic director for data, deciding the best path for information to travel.
Hub	A simple network device that connects multiple computers or other network devices together, sending data to all connected devices.
Data Packet	A small unit of data transmitted over a network. Messages are broken down into packets to travel efficiently.