Lesson Plan

• Recall the definitions of electric charge (Q), current (I), and time (t).
• Apply the relationship Q = I t to calculate any one variable when the other two are given.
• Convert between SI prefixes (µA, mA, A, etc.) and perform unit conversions correctly.
• Analyse practical situations such as battery discharge and fuse operation using Q = I t.
• Identify and correct common mistakes (unit errors, forgetting conversions, assuming constant current).

• Projector and screen
• Whiteboard and markers
• Worksheet with practice questions
• Scientific calculators
• Printed circuit diagram handout (battery‑switch‑lamp)
• Clicker or paper for exit tickets

Begin with the question, “If you switch on a 2 A lamp for 5 seconds, how much electricity has actually moved through it?” Students recall previous work on charge and current, and the success criteria are stated: they will correctly solve Q = I t problems and explain each step.

1. Do‑now (5'): Quick mental task – calculate charge for 1 A lasting 10 s; share answers.
2. Mini‑lecture (10'): Review definitions, derive Q = I t, discuss units and conversions using the whiteboard.
3. Guided practice (12'): Walk through the worked example (2 A lamp, 3.5 min) on the projector; students complete a step‑by‑step worksheet.
4. Collaborative problem solving (15'): In pairs, solve the three practice questions; teacher circulates to provide feedback.
5. Check for understanding (8'): Clicker quiz / exit ticket focusing on common mistakes; brief class discussion of answers.

Summarise how Q = I t links charge, current, and time and why accurate unit conversion matters. Students complete an exit ticket stating one real‑world application of the formula. For homework, assign an additional worksheet with varied Q = I t problems.