Cambridge Lower Secondary Science – Unit 9.3 Resistance & Ohm’s Law (Teacher Guide + Student Workbook | PhET Activities)
Help students move from “why does the lamp dim?” to confidently calculating resistance — using the PhET Circuit Construction Kit: DC – Virtual Lab as their laboratory.
This complete lesson package for Stage 9 / Grade 9 includes a full Teacher Instruction Guide and a matching Student Workbook Assignment.
What’s Included✓ Complete lesson plan (40 minutes / 2 periods)
✓ Teacher scripts, analogies, and classroom explanations
✓ Ready-to-post Google Classroom hook (copy-paste ready)
✓ Three guided PhET simulation tasks with data-recording tables
✓ Three live checkpoints (Chat Waterfall, Thumbs Poll, Cold Call)
✓ Student workbook: PhET tasks, textbook calculations, and written responses
✓ Questions aligned to textbook pp. 320–322
✓ 10-question MCQ assessment (Bloom’s Taxonomy L1–L6, balanced options)
Students will learn to:
- Define resistance and state its unit (ohms, Ω)
- Explain how resistance affects current and electron flow
- State and apply Ohm’s law: V = I × R
- Rearrange Ohm’s law to find voltage, current, or resistance
- Distinguish conductors from insulators using resistance values
- Verify Ohm’s law experimentally using PhET measurements
- Cambridge Lower Secondary Science (Stage 9)
- Grade 9 Science
- Electricity and Circuits Units
- Online, hybrid, or face-to-face teaching
- Google Classroom and Google Meet environments
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