Inside a Computer

Overview

This 60-minute lesson introduces Year 5 SEN students to the key internal components of a computer: CPU, RAM, hard drive, motherboard, and power supply. Using simple language, interactive visual aids, and hands-on activities, students will explore the purpose and function of each part. The lesson aligns with the National Curriculum for England’s Computing programme of study, focusing on understanding computer systems and hardware components.

National Curriculum Links

Key Stage 2 (Year 5) Computing Programme of Study:

Computer Science: Understand computer networks including the internet; how information is transferred.
Computing Knowledge and Understanding: Understand and explain the function of internal components (Computing systems and networks).

This lesson specifically targets:

Use technology purposefully to create, organise, store, manipulate and retrieve digital content (national curriculum goal).
Recognise how digital devices function (hardware and software).
Understand computer hardware language, simplified for SEN learners.

Learning Objectives

By the end of this lesson, students will:

Identify at least five main internal parts of a computer: CPU, RAM, hard drive, motherboard, and power supply.
Describe in simple terms what each component does.
Demonstrate understanding through a hands-on activity assembling parts in a model computer.
Work collaboratively and communicate about computer parts using visual aids and peer discussion.

Materials Needed

Large labelled diagrams/posters of a computer’s internal parts with clear, colourful images
Real or model computer parts (if available, plastic or safe replicas)
Custom-made puzzle kit of internal parts (cardboard cutouts with Velcro or magnets)
Whiteboard and coloured markers
Simple, pictorial word cards with part names and functions
Worksheets with matching activities (picture to name/function)
Timer or stopwatch
Tablet or laptop to show a 3-minute video animation on computer parts (with subtitles and clear narrations)
Sensory fidget toys or stress balls (to support SEN learners during transition or quiet reflection)

Lesson Structure

1. Introduction (10 minutes)

Welcome students and explain the lesson goal in simple language: “Today, we will learn what’s inside a computer and why each part is important.”
Show a large colourful poster of a computer’s inside. Point to parts one-by-one: CPU, RAM, hard drive, motherboard, power supply.
For each part, give a simple explanation using everyday comparisons:
- CPU: The brain of the computer — it thinks and makes decisions.
- RAM: Short-term memory — helps the computer remember things it is doing right now.
- Hard drive: Long-term memory — where everything is saved like photos and games.
- Motherboard: The “body” that holds everything together and helps parts talk to each other.
- Power supply: The “heart” that gives the computer electricity to work.

Use clear, slow speech, visual cards with part names and pictures.

2. Video & Discussion (8 minutes)

Show a simple, captioned animation/video explaining the parts and their functions (3 minutes).
After the video, briefly discuss what they saw, encouraging students to repeat or say in their own words what each part does.
Use question prompts: “What does the CPU do? Who remembers where the power supply is?”
Allow students to touch the visual cards/posters as they answer to support multisensory learning.

3. Hands-on Group Activity: Build a Model Computer (25 minutes)

Divide students into pairs or small groups (2-3 per group). Give each group a puzzle kit with cardboard parts and Velcro/magnets labelled with names and functions.
Instructions: “Put the parts together to build a computer inside this box. Talk with your partner about where each part should go.”
Teacher circulates, supporting through questions, modelling language, and reinforcing function explanations.
Encourage SEN learners to feel the textures, move pieces slowly, and use communication aids if needed.

Extension for advanced learners: Label parts on a blank motherboard drawing.

4. Reflection and Review (10 minutes)

Regroup and play a “Parts Quiz Game”: Teacher holds up a part or picture, students say name and function aloud, or show the correct card.
Use thumbs up/down or smiley face cards for non-verbal responses to include all learners.
Ask students to pair a part with its function using a worksheet matching activity with pictures and simple words.
End with a calming sensory break using fidget toys while students discuss their favourite computer part and why.

5. Assessment & Feedback (7 minutes)

Assess verbally and through observation: check if students can name parts and describe basic functions.
Collect matching worksheets to review understanding.
Provide positive specific feedback: “Excellent work! You remembered that the motherboard connects all parts together.”
Note any students needing further support for future lessons.

Differentiation for SEN Learners

Use simple, clear language avoiding jargon.
Provide multi-sensory learning: visual aids, physical manipulation, verbal repetition.
Allow alternative communication (e.g., pointing, cards) for non-verbal students.
Apply sensory breaks as needed to maintain focus.
Support fine motor skills with larger, easy-to-handle puzzle parts.
Use peer support with mixed ability pairs.

Teacher Notes

Prepare materials in advance ensuring all cards and puzzles are durable and clear.
Keep instructions brief, checking for understanding frequently.
Encourage positive group work and celebrate small successes to boost confidence.
Use real-world examples (‘brain’, ‘memory’, ‘heart’) consistently to link new concepts with familiar ideas.

With this lesson, SEN students will gain a friendly, hands-on introduction to computer hardware that builds foundational technological literacy aligned with the National Curriculum, preparing them for future computing lessons with confidence and curiosity.

Teaching Instructions