# Glossary

- Course: Subject-level offering (e.g., Biology FSc).
- Module: Ordered unit under a course.
- Lesson: Ordered learning item under a module (video/article/etc).
- Enrollment: User-course access record with status and optional expiry.
- Lesson Progress: Per-user lesson watch/completion tracking.
- Course Hub: Student syllabus view for a course (`/learn/{course}`)
- Lesson Player: Student lesson consumption view (`/learn/{course}/lessons/{lesson}`)
- DRM: Protected video delivery through Bunny tokenized playback/embed URLs.
- Device Binding: Security policy restricting account use to a trusted browser/device with cooldown.