# Course anatomy: courses, modules & lessons

> Every course is three layers deep — the course, the modules inside it, and the lessons inside those. Once that mental model clicks, the whole editor makes sense.

Last updated 2026-05-31 · Source: https://prolaud.com/help/course-anatomy

Think of it the way you already think about a classroom subject. The course is the whole subject (say, 'Grade 10 Physics'). A module is a chapter or unit inside it. A lesson is a single sitting — one video, one reading, one quiz. Open /dashboard/courses → New course to start the top layer; you add the layers underneath in the Curriculum tab.

*A course holds modules; each module holds lessons. Drag any module or lesson to reorder.*

## The three layers

- Course — the thing students buy or enroll in. Holds the title, thumbnail, price, and SEO. One course = one subject or program.
- Module — a group of related lessons (a chapter / unit / week). A module has a title and an optional short description.
- Lesson — a single piece of content: a video, a reading, a quiz, a live class, and more (see the 9 lesson types).

## Reordering

In the Curriculum tab you can drag modules to resequence them, and drag lessons within or between modules. Nothing is locked in — restructure as your course grows.

> **Note:** Start small. One module with three or four lessons is enough to publish. You can keep adding modules after launch without disturbing students who already enrolled.

## Related

- [The 9 lesson types — and when to use each](https://prolaud.com/help/lesson-types)
- [Create your first course](https://prolaud.com/help/course-create)
- [Build a course curriculum](https://prolaud.com/help/course-curriculum)