A computer takes in information, works on it and gives results. Keyboards and mice are input devices, monitors and printers are output devices, and pen drives and hard disks are storage devices. The CPU is the computer’s brain. On the internet we keep passwords secret and never chat with strangers.
CPU – Central Processing Unit, RAM – Random Access Memory, ROM – Read Only Memory, USB – Universal Serial Bus, WWW – World Wide Web, URL – Uniform Resource Locator. 8 bits = 1 byte.
Safe online: keep passwords secret, ask a grown-up first, log out after use. Unsafe: sharing passwords or your address, chatting with strangers, clicking unknown links.
Use it for: Class 5 GK and computer lessons, using the school computer lab and staying safe online.
Worked example: 🔤 What does CPU stand for? → Central Processing Unit
CPU is made from the first letters of three words.
C – Central, P – Processing, U – Unit.
Check: The CPU does the computer’s thinking — its brain ✓
Read the question, think about what you know, then tap your answer. Stuck? Press “Show me how”.
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🏁 Lesson 29 test
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
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🖱️ Net Smart Kid badge when you pass — and a certificate when you finish all 6 lessons of
Part 5 · Class 5 GK. You can still take the test without signing in.
🖨️ Class 5 GK Worksheet: Computer and Internet Basics
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