Appendix A — Data elements
- Students — first name, age, class group, grade level, subject stage, exercise results, progress (XP/level/streak), optional avatar description. No SSN, no student email, no student password; access via class code + name selection.
- Guardians (optional) — name, email, phone, relationship; only if the School enables parent-share.
- Staff (teachers/admins) — name, email, role, password hash.
- Billing — school billing contact and address (school-level, not student data).
- Technical — IP address, device/browser signals for device approval, rate limiting, bot protection; deleted on closure.
The Provider does not process health, biometric, or other special-category data.