See this thread https://una.io/d/why-don-t-we-have-categories-in-modules

• ^^ Peter
•  · 
• 5 Jan 2023

Classes belong to Courses. So a course has Classes. Categories for Courses can be managed in studio/forms/datalists/courses, Classes dont have categories. Modules neighter.

So the workflow is:

1. Create a course
2. Create a Module (1 to many) within this course
3. Create a Class (1 to many) within this Module