| Lesson Plan |
| Grade: |
Date: 25/02/2026 |
| Subject: Computer Science |
| Lesson Topic: Explain the difference between Programmable ROM (PROM), Erasable Programmable ROM (EPROM) and Electrically Erasable Programmable ROM (EEPROM) |
Learning Objective/s:
- Describe the architecture and programming method of PROM, EPROM, and EEPROM.
- Compare the erase mechanisms and re‑programming capabilities of the three ROM types.
- Identify typical applications for each ROM type based on their characteristics.
- Explain the endurance limits and physical packaging differences among PROM, EPROM, and EEPROM.
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Materials Needed:
- Projector or interactive whiteboard
- Slide deck summarising ROM types
- Sample ROM chips or images (PROM, EPROM with quartz window, EEPROM)
- UV‑light eraser demonstration kit (or video)
- Worksheet with a comparison table
- Markers and sticky notes for group activity
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Introduction:
Begin with a quick question: “Where does a computer store its permanent firmware?” Students recall prior knowledge of ROM and its role. Today they will explore how different programmable ROMs are created, erased, and reused, and they will know how to choose the right type for a given application.
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Lesson Structure:
- Do‑now (5’): Students list devices they think use ROM and share examples.
- Mini‑lecture (10’): Present key concepts and differences using slides.
- Demonstration (8’): Show a UV‑eraser video and explain PROM programming equipment.
- Guided practice (12’): Small groups complete a comparison chart for PROM, EPROM, and EEPROM.
- Check for understanding (5’): Whole‑class quick quiz (clickers or show of hands).
- Consolidation (5’): Teacher summarises main points and addresses misconceptions.
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Conclusion:
Review the three ROM types, emphasizing their erase methods and re‑use cycles. Students complete an exit ticket by writing one scenario where each ROM type would be most appropriate. For homework, assign a short research task to find a modern device that uses EEPROM and explain why it is chosen.
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