Computing · Year 3 · Connecting the Dots: Networks and the Internet · Autumn Term

Local Area Networks (LANs) in Action

Students explore practical examples of LANs, identifying components like routers, switches, and cables within their school environment.

• National Curriculum Attainment Targets
• KS2: Computing - Computer Networks
• KS2: Computing - Information Technology

About This Topic

Distinguishing between the World Wide Web and the internet is a common challenge, even for adults. In Year 3, we teach that the internet is the vast infrastructure of hardware, the cables, satellites, and routers, while the web is the collection of information and pages we access using that hardware. This distinction is vital for digital literacy, helping students understand that the internet supports many services beyond just websites, such as email or online gaming.

This topic aligns with the KS2 requirement to understand the internet as a network of networks. By learning about web addresses and servers, students begin to see the logic behind how digital content is organized and retrieved globally. Students grasp this concept faster through structured discussion and peer explanation where they compare the internet to a library building and the web to the books inside.

Key Questions

1. Explain the function of a router in connecting multiple devices.
2. Compare how wired and wireless connections transmit information.
3. Construct a simple diagram illustrating how devices in our classroom connect to the internet.

Learning Objectives

• Identify the main components of a Local Area Network (LAN) within the school environment, such as routers, switches, and cables.
• Explain the function of a router in directing data traffic between multiple devices on a network.
• Compare the process of transmitting information via wired connections versus wireless connections.
• Construct a simple diagram illustrating how classroom devices connect to the school's LAN and subsequently to the internet.

Before You Start

Introduction to Digital Devices

Why: Students need to be familiar with common digital devices like computers, tablets, and printers to understand how they connect.

Basic Internet Concepts

Why: Understanding that the internet is a way to access information and communicate is foundational for grasping how a LAN connects to it.

Key Vocabulary

Local Area Network (LAN)	A computer network that connects devices within a limited area, such as a home, school, or office building.
Router	A device that forwards data packets between computer networks. It acts like a traffic director, deciding the best path for information to travel.
Switch	A network hardware component that connects devices together on a computer network by using packet switching to receive, process, and forward data to the destination device.
Network Cable	A physical wire, like an Ethernet cable, used to connect devices in a wired network, transmitting data signals.
Wireless Connection	A method of connecting devices to a network using radio waves, such as Wi-Fi, without physical cables.

Watch Out for These Misconceptions

Common Misconception

The internet and the World Wide Web are exactly the same thing.

What to Teach Instead

Use the 'tracks and train' analogy: the internet is the tracks (the hardware), and the web is the train (the service) running on it. Active sorting tasks where students categorize 'hardware' vs 'services' help clarify this.

Common Misconception

The internet is 'in the air' or 'in the clouds' and has no physical form.

What to Teach Instead

Show photos of massive undersea cables and server farms. Explaining that the 'cloud' is actually just a building full of computers in another location helps ground the concept in reality.

Active Learning Ideas

Simulation Game: The Web vs. The Highway

Create a floor map where 'roads' represent the internet cables. Students act as 'trucks' (the internet) carrying 'cargo' (web pages, emails, or videos) to different destinations to show that the road exists to carry different things.

20 min·Whole Class

Inquiry Circle: URL Anatomy

Give groups a set of printed web addresses. They must 'dissect' them to find the 'www', the name of the site, and the domain (like .uk), discussing why each part is needed to find the right 'house' on the internet.

30 min·Small Groups

Gallery Walk: Services of the Internet

Place posters around the room representing different internet services (Web, Email, Gaming, Streaming). Students rotate to add stickers or notes about which ones they use, reinforcing that the web is just one part of the whole.

25 min·Small Groups

Real-World Connections

• Network engineers at companies like BT Group design and maintain the infrastructure that connects homes and businesses to the internet, using routers and switches to manage data flow.
• IT support staff in schools are responsible for setting up and troubleshooting the school's LAN, ensuring students and teachers can access online resources and the internet reliably.
• The development of Wi-Fi technology, a form of wireless connection, has enabled portable devices like laptops and smartphones to connect to networks in cafes, airports, and homes without needing cables.

Assessment Ideas

Exit Ticket

Provide students with a small slip of paper. Ask them to draw a simple diagram showing their classroom computer connecting to a router, and label at least two network components. Then, ask them to write one sentence explaining what the router does.

Quick Check

During a classroom walk-through, point to a visible network cable or a router. Ask students to identify the component and explain its basic function in one sentence. For example, 'What is this, and how does it help our computers talk to each other?'

Discussion Prompt

Pose the question: 'Imagine our school's internet suddenly stopped working. What are two possible reasons, related to the network components we've learned about, why this might happen?' Encourage students to think about routers, switches, or cables.

Frequently Asked Questions

What is the best analogy for the Internet vs the Web?

The 'Library' analogy works well: The Internet is the building, the shelves, and the electricity. The World Wide Web is the collection of books stored on those shelves. You need the building to hold the books, but the building isn't the book itself.

Is it too early to teach Year 3 about servers?

Not at all, as long as it is kept simple. A server is just a powerful computer that 'serves' information to others. Using the term helps them understand where a website 'lives' when their own computer is turned off.

How can active learning help students understand the internet?

Active learning strategies like 'The Human Highway' allow students to physically experience the difference between infrastructure and content. By acting as the 'cables' or the 'data', they see how the physical network supports the digital service. This movement-based learning helps cement the abstract distinction between the hardware they can't see and the software they use every day.

Why do we use .uk in web addresses?

It tells the computer that the website is likely based in the United Kingdom. It is like the postcode on a letter, helping the internet route the request to the right part of the world.