Assign a skill, not an answer key.
A configuration URL reopens the same exercise constraints with a newly randomized question set. It contains no pupil identity or private progress record. For example, assign ten root-position major and minor chord constructions in treble clef within C4–C6. Ask students to review every revealed spelling before continuing and report the questions that confused them.
Use receipts as practice reports.
After a complete set, a learner can download a JSON receipt containing the exercise settings, question count, first-answer score and timestamps. A SHA-256 digest helps spot accidental file changes. All of this is produced in the browser and is editable by its owner; it is not an authenticated certificate or a secure assessment system. There is no server-side pupil register, identity check or automatic gradebook submission.
Make your own visual material.
The custom diagram generator accepts written pitches with octaves and exports SVG or PNG keyboard and staff illustrations. Keep the included source credit when sharing an image. Compare two diagrams differing by a single accidental to make a lesson question. Use blank staff paper for handwritten responses or the piano reference PDFs beside an instrument.
Progress without accounts.
Students may explicitly enable local summaries for supported trainers. XP and achievements are participation milestones on that device, not grades or evidence of physical technique. Export and clear controls are available in the dashboard. A shared classroom browser should be handled according to the teacher’s own privacy arrangements; there is no cross-device account synchronization.