SS 1 Third Term

Lesson objectives

By the end of the week, learners should be able to:

1. Describe the parts of a communication system diagram.
2. Trace data from sender to receiver through the three sections.
3. Explain why feedback matters in communication.
4. Name three real-world communication systems at school, home and transport.
5. Compare active and passive components on the same criteria.

Key vocabulary

• Communication system: a chain passing information between sender and receiver.
• Sender: the originator of the message.
• Medium: the physical or wireless path carrying the signal.
• Receiver: the destination that recovers the original message.
• Feedback: a return signal confirming the receiver understood.
• Active component: a device that requires power to pass the signal.
• Passive component: a device that does not require power to pass the signal.
• Block diagram: a visual showing the three system sections.

Common misconceptions

• "A communication system is only sending data." A communication system includes receiving and acknowledging.
• "Medium is the same everywhere." Copper wire, fibre optic and radio waves differ fundamentally.
• "Feedback is optional." Feedback closes the loop and confirms successful delivery.

Teacher activities

1. Starter: display a simplified communication system and ask where the sender sits relative to the receiver.
2. Name each section of the block diagram one by one and give each a role.
3. Model tracing one message from sender to receiver through all three sections.
4. Name three real-world systems and identify which section each sits in.
5. Compare active and passive components on cost, range and reliability.
6. Close with the exit question about why feedback matters.

Student activities

1. Place the starter diagram and name each section in their own words.
2. Trace one message from sender to receiver through the three sections on paper.
3. Name three real-world communication systems and state each section.
4. Compare active and passive components on two criteria each.
5. State why feedback closes the communication loop in one sentence.
6. Answer the exit question in one sentence about feedback.

Practical / learning evidence

A completed block diagram trace with named sections, three real-world systems matched to sections, and an active versus passive comparison chart. Hand in all three for marking.

Resources and preparation

Printed diagram templates, blank trace sheets and comparison charts. Offline route: paper versions, no device needed. Supervise any physical component demo carefully. Provide large printed templates for low-vision learners.

Assessment for learning

Inspect the trace for correct section naming. Match the real-world systems sensibly. Check the active versus passive comparison for at least two criteria each. Flag any learner who omits the feedback role.

Inclusion and homework

Provide the blank diagram prelabelled for learners who need scaffolding. Allow oral completion for the real-world matching. Extend confident learners with five systems and a fifth criterion. Homework: draw your household communication system and label all sections.