Lesson Plan

• Describe the role of internal (primary) memory in a computer system.
• Distinguish between volatile (RAM) and non‑volatile (ROM) memory.
• Explain the functions, characteristics and main types of RAM (DRAM, SRAM).
• Identify the various types of ROM and how they can be programmed or erased.
• Compare RAM and ROM in terms of speed, capacity and typical usage.

• Projector and screen
• PowerPoint slides / digital diagram of CPU‑RAM‑ROM
• Printed handout with comparison table and revision questions
• Sample RAM module and ROM chip (or images)
• Worksheet for group activity
• Exit‑ticket slips

Begin with a quick demo: power on a laptop and ask, “What do you think happens inside the computer before the screen appears?” Connect this to students’ prior knowledge of storage devices and set the success criteria: by the end of the lesson they will be able to explain how RAM and ROM work and why each is essential.

1. Do‑Now (5’) – Students answer two short questions on volatile vs non‑volatile memory on a mini‑whiteboard.
2. Mini‑lecture with slides (10’) – Overview of internal memory, definition of volatility, introduction to RAM and ROM.
3. Hands‑on demonstration (8’) – Show a RAM stick and a ROM chip (or images); discuss read/write capability and permanence.
4. Group comparison activity (12’) – Using the printed table, groups fill in missing details and create a Venn diagram of RAM vs ROM.
5. Guided practice (10’) – Pairs answer the “Quick Revision Questions” from the source; teacher circulates to check understanding.
6. Exit ticket (5’) – Each student writes one key difference between RAM and ROM and one real‑world example.

Summarise the main points: RAM provides fast, temporary workspace while ROM stores essential firmware that never disappears. Collect exit tickets to gauge understanding, and assign a brief homework task to research how SSDs differ from traditional RAM/ROM storage and create a simple flashcard.