Story → graph — then the walk decidestwo rounds · commit before reveal
One motion, three languages: a story in words, a graph of position against clock reading, and the walk itself. Read the story, commit to the graph that tells it — in ink on the worksheet — then let the walk judge.
The story — Round 1
Class commits (tap as hands go up)
Which graph tells this story? Commit first — ink, then hands.
Individual mode: tap your choice. It locks when you press Reveal.
Graph → story — say what it saysone graph · four stories
Now the direction is reversed: the graph is given, and four stories claim to tell it. Commit to one in ink before Reveal.
Class commits (tap as hands go up)
Which story does this graph tell?
Walk → words and graph — the dictationdrive it · write it · sketch it
A volunteer drives the walker (drag, or ←/→ keys). Press Start to record 10 seconds. Everyone else writes the walk's story and sketches its graph on the worksheet — in ink — then Replay confronts both.
clock reading t = 0.0 sposition x = 3.0 m
Teacher: collect three student stories aloud after the replay. For each, ask the class: which checklist answer is missing or wrong? A story that names no start position cannot be drawn — that is the point.
Possible or not?five story cards · commit each
Some stories cannot be walked by any object — not because they are strange, but because they break what position and clock readings are. Commit Possible or Impossible for each card in ink, then reveal each.
Builder — story editionbuild the model · read the story back
Build a motion out of segments of steady velocity — and watch the Builder tell the story back in words. Then pin a claim (“at t = …, x = …”) and see whether your claims agree. The cards and the read-back are the judges.
Your model
Start position x₀ = m
Pin a claim
at t = s , x = m
Challenges — build the story