Wire Tap
Part of Module 4 of Bitcoin for Juniors →
PROCEDURE
OPENING
- Prepare simple and complex messages in advance.
- Decide team groupings of 6–8 students.
- Clear space so students can line up or move safely.
PRE-ACTIVITY
5 minutes
- Ask students if they have ever played telephone.
- Ask whether the message always stays the same.
- Explain that today they will test who can be trusted with a message.
- Avoid introducing technical or abstract terms.
Objective In Student’s Words
- “See what happens to a message when different people carry it.”
ACTIVITY
30-35 minutes
Setup
- Divide the class into small teams.
- Explain that each team will run several short rounds with the same structure but different rules.
- Emphasize that no one is in trouble for mistakes.
Model
- Demonstrate whispering rules using a very short example.
- Reinforce rules clearly: whisper only, no repeating, no fixing mistakes.
Carry Out
Round 1 – Easy Message (Trusted Chain)
- Whisper a very simple sentence to the first student.
- Students pass the message by whispering down the line.
- The last student says the message out loud.
- Checkpoint: Was the message correct, did anyone change it on purpose, did it feel easy to trust the group?
Round 2 – Hard Message (Complex Information)
- Use the same setup with a longer, more precise sentence.
- Run the whisper chain again.
- The last student says the message out loud.
- Checkpoint: What changed, where did it break, was anyone being bad or was it just hard?
Round 3 – Hidden Rule (Intentional Change)
- Use the same complex message.
- Secretly tell one student in the middle they may change one word.
- Do not announce that this rule exists.
- Run the whisper chain.
- Checkpoint: Did this feel different from mistakes, how could we tell something was wrong, what felt unfair?
Optional Variant – Running Dictation (Control vs Trust)
Round 4 – Trusted Runner
- Place the message written on paper across the room.
- One student runs to read it and returns to tell the writer.
- The writer records the message.
- Checkpoint: Was this clearer than whispering and why?
Round 5 – Untrusted Space
- Add a listener near the runner’s path.
- The listener may hear but must not see the message.
- Checkpoint: Who learned something they shouldn’t have and was the message still safe?
Optional Final Twist – Locked Message
- Repeat running dictation with the message written in a simple symbol code (See Appendix B).
- Ask students to observe who can understand it.
- Checkpoint: Who can read it and who hears it but learns nothing?
Reflection
- Ask who should hear everything.
- Ask who should hear nothing.
- Ask who should decide.
- Allow students to name the problem in their own words.
FOLLOW-UP
5-10 minutes
- Review that messages can change, leak, or be altered.
- Reinforce that trust depends on rules and boundaries.
- Connect to earlier lessons on public versus private information.
CLOSE
5 minutes
- Thank students for participating honestly.
- Reset the classroom layout.
- Final message to students: Being careful with information helps protect people.
NOTES
Classroom management
- Normalize mistakes and emotional reactions while maintaining calm control.
- Do not accuse or reveal the hidden rule-breaker unless students explicitly ask.
Extensions & Sponge Activities
- Write a class rule for protecting messages or redesign the game to make it fairer.
Differentiation
- Younger students: shorter messages and fewer rounds.
- ELL/Accessibility: visual cues, slower pacing, buddy support.
- Safety: controlled movement and clear whispering rules.