What is stored, and where it goes

Before sign-in, answers, drafts, study time and first practice are saved under a random guest identifier in a protected cookie for 30 days. A backup draft stays in this browser. Guest work is transferred to the account on registration or sign-in.

An account needs a nickname and password. Passwords and recovery codes are stored as protected hashes. The recovery code is shown only when issued: keep it safe. No email is required to register.

To answer a question, your task and the relevant lesson text may be sent to DeepSeek. Do not enter passwords, keys or other people's personal data. A teacher may read submitted work for review.

Images. Live image and video generation are currently disabled. Existing saved media remain part of your account. External-service cards are references, not included subscriptions.

What the teacher can see. Teachers can view saved progress, practice runs and submitted questions or work to provide feedback. Do not include confidential information in learning exercises.

Deleting. Export my work downloads your saved course data. Delete my data removes your account and its records from the active database. Temporary backup copies may remain until the backup retention period ends.