Theory
State the engineering choice you must justify. Stage intent: justify.
For teachers
Prepare a mission
Everything you need to run the lesson: the prompts for this academic depth, the diagnostic answer key, the misconceptions to watch for, and the truth boundary to hold.
Choose the mission and depth
Take the picture. Get it home.
A camera that sees more detail makes bigger pictures, and a spacecraft can only send home so much before the pass ends. Your team will fly the same observation with two cameras and work out which one actually delivers more to the ground.
Pilot lesson
What to say at Grade 8
These prompts come from the academic layer, so they change with the depth you selected.
Prediction
Predict which option better satisfies the named criterion.
Running the Twin
Use the Twin to gather comparison evidence for your justification. Runtime remains the frozen Twin; this plan does not execute physics.
Checkpoint
Check that your evidence actually supports the criterion.
Analysis
Justify the choice and name at least one model limitation. Evidence intent: payload/image/data-quality report + selection/trade rationale.
Engineering decision
Select and defend an engineering option for this mission question.
Limitation
Name at least one frozen-model limitation that this experiment cannot answer.
Provenance
Keep simulated, simulated_sensor, estimator_state, derived, reference, and measured distinct. Never label simulated as measured.
Diagnostic answer key
A camera is changed for one that sees finer detail. What happens to the size of each picture?
- ✓ It gets bigger, because there is more information in it
- · It stays the same
- · It gets smaller
Timing
One session of 55–70 minutes. Adjust freely — the sequence matters more than the clock.
| When | Stage | What you are doing |
|---|---|---|
| 0 → 5–6 min | Mission | Set the role, objective, mission question, and success criterion. |
| 5–6 → 17–21 min | Preparation | Diagnostic, theory, and a written prediction before any run. |
| 17–21 → 20–25 min | Readiness | Learners confirm the local formative gate after preparation passes. |
| 20–25 → 35–45 min | Operate | Run the bounded baseline, then the candidate where comparison is disclosed. |
| 35–45 → 47–60 min | Evidence | Inspect provenance, select evidence, decide, state a limitation, and complete the formative assessment. |
| 47–60 → 53–68 min | Complete | Review the result band, reflect, and finalize local practice at any band. |
| 53–68 → 55–70 min | Recognition | Explain the local record and the separate future verified-recognition boundary. |
Misconceptions to watch for
Authored lesson design — what a class reliably gets wrong here, and where you can catch it. Not a claim about any learner.
“The sharper camera is better, because more detail is always worth having.”
Ask for the delivered figure rather than the resolution. The budget that decides the mission is the one that did not change between the runs.
Watch: the decision option "Recommend the sharper camera because detail is always better" · Code: constraint_budget_or_tradeoff_omission
“A picture the spacecraft took is a picture the mission has.”
Put captured and delivered in two columns. The gap between them is the mission, and a learner who collapses it has answered a different question.
Watch: evidence — The camera comparison for the two spacecraft · Code: evidence_provenance_or_verification_gap
“Finer detail makes each picture smaller, because the pixels are smaller.”
More detail over the same ground means more pixels, so more data. Have them say what 'finer' is counting before they reason about the size.
Watch: the "detail" diagnostic · Code: units_scale_or_sign_error
Reflection and extension
What a good reflection contains
What did you give up in order to deliver more useful data, and what real payload evidence is still missing?
- Decides on what reached the ground, not on what the camera could resolve.
- States the downlink budget as the binding constraint, and notes it is identical in both runs.
- Keeps captured and delivered as two different counts.
If they finish early, or go further
- Spend the budget deliberately (Grades 9–10 and above)
With the downlink fixed, decide how many high-detail images you would trade for how many simple ones, and state the mission purpose that justifies your split.
- What reached the ground (Grade 8 and above)
Write the mission report twice — once counting what was captured, once counting what was delivered. Say which version you would send to whoever funds the mission, and why.
Facilitation and the truth boundary
While they work
- Learners reliably choose the sharper camera on detail alone. Push them to the delivered figure.
- The downlink budget is identical in both runs. That constraint is the mission.
- Keep captured and delivered separate: a picture taken is not a picture received.
Can the learner distinguish what was captured from what reached the ground, and choose on the latter?
Hold this line
- These results are produced by a model. No real image was captured and no real downlink took place.
- The cameras are teaching profiles, not real instrument designs.
- This lesson does not establish how any real payload would perform in orbit.
Home mission
Home mission: what fits
Find two photos on a device and check their file sizes. Work out how many of each you could send over a connection that allowed only 10 MB. Write one sentence on what you would give up to send more of them.
Tell us what did not work
Ten questions, answered locally. Nothing is submitted or tracked — you download the file and send it if you want to.
Informal educator feedback
This local-first form contains the ten approved pilot-review questions. It does not submit, track, or store data remotely. Optional name/contact should be handled outside this form only if a reviewer volunteers it.