Categories and subcategories -- what is the structure? Examples:

• Campus | Department/School | Year | Subject
• Year of Entry | Topic | Subject
• Customer | Subject | Proficiency Level
• Trainer | Module

User authentication and enrollment:

Self-enroll, manual enroll, group enroll

ex: guest access is sitewide (read-only)

Groups vs one big community or class. Group mode is useful when the same course is run multiple times with separate batches of students.

Completion tracking by student, teacher, admin

Roles and permissions, 

Presenters can request courses, but only users with admin privileges can approve courses

Can set up payment through PayPal