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Mountain measurements: explain the starting point
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Provenance: Constructed RS Learning Lab teaching walkthrough, AI-assisted on 2026-09-11. It adapts Resource Which mountain is tallest? and its NOAA/USGS source attribution. Attempts, prompts, and possible hints below are authored illustrations, not observed learner or chatbot exchanges. Classroom evidence remains deferred.
Resource Return to the Gallery · Resource Open the reference packet
Goal and first attempt
Goal: explain why a mountain's name alone does not settle a height comparison.
Constructed unaided attempt: “Everest is the tallest. If another source says Mauna Kea, one source must be wrong.”
The learner has a claim to examine. Do not reveal the full comparison yet. Ask what the learner thinks “tallest” measures and where that measurement begins.
Request one hint live
Open the NOAA comparison and USGS volcano explanation through the reference packet. Provide the relevant short, permitted passage if the tool cannot read the sources.
My goal is to explain why these two mountain answers might differ. My attempt is: “Everest is the tallest. If another source says Mauna Kea, one source must be wrong.” Using the supplied passage, give one hint about what I should compare. Do not write my final explanation. Wait for my retry.
Possible hint to inspect, not a recorded response: “Mark where each measurement starts and ends. Does one include a part below the ocean?”
Use the actual live response in your practice. If it supplies the final answer, ask a new question instead of treating repetition as an unaided retry.
Check before using the hint
NOAA distinguishes mean-sea-level elevation from base-to-summit height. USGS identifies the ocean floor in its Hawaiian-volcano comparison. Open those passages and check that the hint points to a supported distinction. Neither source needs to be wrong merely because the questions differ.
Retry in the learner's words
Constructed retry: “Everest answers the question about elevation above mean sea level. Mauna Kea answers NOAA's base-to-summit comparison, including the submerged part that USGS describes. I need to name the starting point before choosing a mountain.”
Ask the learner to draw the starting points without the AI answer visible and explain the sketch. Label it schematic, not to scale. The source check supports the distinction; copying this sentence does not demonstrate it.
Transfer to a changed question
Try first: “Would that explanation also tell me which summit is farthest from Earth's center?” Sketch what the new measurement includes, then check NOAA. Its comparison identifies Chimborazo for that different question. Ask what changed about the starting point and why a base-to-summit answer cannot simply be reused.
Choose whether to stop with the distinction or investigate how a mountain's underwater base is measured. Exact survey questions need evidence beyond these agency summaries.
Facilitator notes
Reveal the modeled retry only after learners attempt their own. If the first live answer already distinguishes the measurements, use that success and move to the transfer question; do not manufacture a failure. Ask for an explanation of the measurement, not a memorized list of three names. Then invite an unworked question or a learner's own study goal.