Prep
- ✓ Parts: battery holder, press switch, speaker or alarm IC, and the exact connectors shown in the approved kit diagram.
- ✓ Print one Morse key per student and the Signal Lab packet.
- ✓ Approve short classroom-safe messages before students rehearse.
- ✓ Set a volume routine: three-second sound check, then switches stay untouched while instructions are given.
Deck map
Day 8: slides 39-45. Leave slide 45 projected.
Day 9: slides 46-50. Leave slide 50 projected.
Day 10: slides 51-56. Leave slide 55 projected during submission; use slide 56 for closure.
Teacher moves
- Model one Morse letter with your voice or hand first. The pause is part of the code.
- Test the sound circuit before students encode a message.
- First decode: the partner sees the key, not the written answer. Record the partner's exact response.
- Revision must respond to evidence: timing, spacing, volume, or a loose connection.
- Final decode uses the same no-hint rules.
Message bank
GO · OK · YES · NO · WAIT · TURN · OPEN · CLOSE
Support route: assign a three-letter message, partially complete the planner, rehearse one letter at a time, and allow one full replay. Grade the same rubric.
If time is tight
Use the integrated alarm diagram for every pair, assign messages, and limit revision to one tested change. Do not remove the blind first decode or the final decode; those are the project evidence.