Flip the cards to learn more about courses, lessons, and modules.
(Note: The flipcards are a feature built into Sensei Pro!)
Courses
A course is a collection of lessons.
Lessons
Each course can contain any number of lessons.
Modules
Lessons in a course can also be organized into modules which are sometimes also called chapters.
Here is a quick diagram that shows how a Course contains lessons, quizzes, and sometimes modules.

Easy!