LMS Retention Landscape — 3D Spaced Repetition Field

This visualizes an entire LMS course catalog at once: every module is a bar in a 3D field, its height set by that module's live retention on the Ebbinghaus forgetting curve R(t) = e^(−t/S). Instead of grading modules by hand, an autonomous simulated cohort reviews each bar the instant it falls to the review threshold, sampling a recall quality from the cohort's average skill and feeding it straight into the SM-2 rule — so ease factors and memory strengths evolve on their own across the whole catalog. Watch reviewed bars flash gold and snap back to full height, then decay again at a slower rate each time, exactly the self-regulating rhythm a real spaced-repetition backend keeps for thousands of learners.