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Gamified metrics are convenient because they are easy to count, easy to display, and easy for everyone to feel good about: the number goes up, parents relax, children feel accomplished. The catch is that they count usage, not understanding.
A harder but more honest question: has this child’s grasp of buoyancy changed since last month, and where exactly? Answering it takes not a score but evidence that traces back to specific moments — the question that exposed a misconception, the experiment that made them revise their explanation, the time they finally got it across to someone else.
The latter is what we record. The learner growth evidence timeline keeps the process by which understanding shifts, and every conclusion replays back to the dialogue, artifact, or experiment behind it. Teachers get a teaching view of the same evidence; parents get a summary view.
Leaderboards and streaks are appealing because they make progress instantly displayable. What is instantly displayable, though, is rarely the part that actually takes time.