Digital System Components: Inside and Out

Active learning helps young students grasp abstract digital safety concepts through concrete, hands-on experiences. Acting out scenarios and manipulating materials builds understanding that rules and personal boundaries exist both online and offline.

• Foundation
• Technologies
• 3 activities
• 15 min–30 min

Learning Objectives

1. Identify external components of a digital device, such as a screen, keyboard, or mouse.
2. Classify internal components of a computer, like the CPU, memory, and storage, based on their function.
3. Explain the role of the CPU as the 'brain' of a computer in simple terms.
4. Compare the function of a digital system with and without a power source.

Inquiry Circle

⏱ 30 min·Small Groups

Inquiry Circle: The Trusted Adult Tree

In small groups, students draw a tree and paste photos or drawings of people they can ask for help when using technology (teacher, parent, police officer). They discuss why these people are safe to talk to.

Prepare & details

Differentiate between internal and external components of a digital system.

Facilitation Tip: During Collaborative Investigation, circulate and listen for students to name specific adults they trust, reinforcing that safety rules apply at home and school.

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

Role Play

⏱ 20 min·Pairs

Role Play: Asking Permission

Students practice a simple three-step routine: 'Stop, Ask, Wait'. They role play scenarios where they want to use a tablet or take a photo, practicing the exact words they need to use to ask a teacher or friend first.

Prepare & details

Explain the function of a computer's 'brain' in simple terms.

Facilitation Tip: For Role Play, model the scripted phrases yourself first so students see the expected tone and language.

Setup: Open space or rearranged desks for scenario staging

Materials: Character cards with backstory and goals, Scenario briefing sheet

• Apply
• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

Think-Pair-Share

⏱ 15 min·Pairs

Think-Pair-Share: Private vs. Public

Show cards with items like 'my name', 'my favorite color', and 'my home address'. Students discuss with a partner which ones are okay to tell a stranger on a game and which ones should stay private.

Prepare & details

Predict how a digital system would behave without its power source.

Facilitation Tip: In Think-Pair-Share, provide picture cards of private and public spaces to scaffold the discussion for students who need visual support.

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

Teachers should use consistent, repetitive language when discussing safety rules, as young children need repeated exposure to internalise routines. Avoid overcomplicating explanations; focus on actionable steps like 'Stop, Ask, Wait' rather than abstract definitions of privacy. Research shows that role-playing real-life scenarios helps children transfer offline safety skills to digital contexts more effectively than lectures alone.

What to Expect

Students will demonstrate safe digital habits by asking permission before sharing information, identifying trusted adults in different contexts, and distinguishing between private and public spaces with guidance.

Watch Out for These Misconceptions

Common Misconception

During Collaborative Investigation, watch for students who point to bright, friendly icons and assume they are safe.

What to Teach Instead

Pause the gallery walk and ask students to recall the 'Stop, Ask, Wait' rule, then have them sort the icons into 'looks safe' and 'ask an adult' columns to reinforce that appearance doesn’t guarantee safety.

Common Misconception

During Role Play, watch for students who treat online interactions the same as in-person interactions.

What to Teach Instead

Use the sorting activity from Think-Pair-Share to clarify differences, having students categorise people they know in real life versus people they only see on a screen.

Assessment Ideas

Quick Check

After Collaborative Investigation, show students a tablet and ask: 'Point to something you can touch on the outside of this tablet.' Then ask: 'What part inside makes it think?' Record which students correctly identify the CPU as the 'brain'.

Exit Ticket

After Think-Pair-Share, give each student a drawing of a simple computer. Ask them to draw one external part and label it, and draw a box inside and label it 'Brain' (CPU) to assess their understanding of internal components.

Discussion Prompt

During Role Play, ask students: 'Imagine your toy robot suddenly stopped working. What is the first thing you would check to make sure it has power?' Use their responses to discuss the importance of power sources for all digital systems.

Extensions & Scaffolding

• Challenge students who finish early to create a new scenario where a child needs to ask for help in a digital setting.
• Scaffolding: Provide sentence starters on cards for students who struggle to articulate their thoughts during discussions.
• Deeper exploration: Have students draw a picture of a trusted adult helping them with a digital device and explain their drawing to a partner.

Key Vocabulary

Digital System	A device that uses electronic parts to process information, like a computer, tablet, or phone.
External Component	Parts of a digital system that you can see and touch from the outside, such as a screen or buttons.
Internal Component	Parts inside a digital system that you cannot see, like the computer's 'brain' or memory.
CPU (Central Processing Unit)	The 'brain' of the computer that follows instructions and makes calculations.
Power Source	What gives a digital system the energy it needs to work, like a plug or batteries.