| Lesson Plan |
| Grade: |
Date: 25/02/2026 |
| Subject: Biology |
| Lesson Topic: explain the roles of the sinoatrial node, the atrioventricular node and the Purkyne tissue in the cardiac cycle (knowledge of nervous and hormonal control is not expected) |
Learning Objective/s:
- Describe the location and primary function of the SA node, AV node, and Purkinje tissue.
- Explain the sequence of electrical events that coordinate atrial and ventricular contraction.
- Compare the timing and role of each conduction component within one cardiac cycle.
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Materials Needed:
- Projector and screen
- PowerPoint slides with labelled heart conduction diagram
- Printed worksheet/blank diagrams for labeling
- Whiteboard and markers
- Simple heart model (optional)
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Introduction:
Begin with a short video of a heartbeat sound and ask students what creates the “lub‑dub”. Recall that the heart’s muscle contracts in a coordinated way. Explain that today they will identify how the SA node, AV node and Purkinje tissue generate and transmit the electrical impulse that drives this rhythm.
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Lesson Structure:
- Do‑now (5'): quick quiz on heart chambers and basic function.
- Mini‑lecture with PowerPoint (10'): introduce SA node, AV node, Purkinje tissue and show the conduction pathway.
- Guided analysis (10'): walk through the numbered sequence of electrical events, linking each step to atrial or ventricular systole.
- Group activity (10'): students label a blank diagram and discuss why the AV node delay is essential.
- Check for understanding (5'): think‑pair‑share followed by an exit ticket where each student writes one sentence describing the role of each component.
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Conclusion:
Recap that the SA node initiates the impulse, the AV node provides a brief delay, and the Purkinje tissue rapidly distributes the impulse for synchronized ventricular contraction. Collect the exit tickets and assign a textbook reading plus a worksheet to reinforce the sequence of events.
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