CALE · Competency-Aligned Learning Engine

Proof that someone actually learned it.

The measurement engine behind Reaves Academy, running live in your browser. It turns a stream of answers into a defensible mastery score — asymmetric, so mastery is earned and can be lost, and time-aware, so it decays like memory does. Every constant below is read from the XML node, not hardcoded. Patent Serial 64/007,323.

0
not started
080 · mastery line100

Correct answer

Wrong answer

each answer updates the scoreΔ

Durability — forgetting curve

Best score reached: 0 · half-life days

Score today: 0 ·

The contract

IN  { attempts: [ { isCorrect, responseTimeMs } ] }

OUT { smartScore 0–100, masteryBand, errorType, halfLifeDays }

Free · up to 100 subjects Embedded · $0.50 / subject / mo Platform · $150 / mo Enterprise · quote

The single source of truth — these exact values drive the engine above

This is the real engine, not a mock: the code running above is the same pure library used in production, and it refuses to run if the node's constants are missing. Interested in embedding proof-of-learning? [email protected] · part of Reaves Labs.