Thanks a lot for this idea. We have just released this feature. More at https://blog.eliademy.com/2016/09/29/quizzes-in-a-live-learning-platform/
At this moment of time content in Eliademy is “linear”. Most of the teachers simply add numerals to topic names to add depth. For example:
1.1 – Topic A
1.2 – Topic B
2.1 – Topic C
Despite all this, we have few ideas how to add additional layering that would be easy to create, manage and understand. Stay tuned and vote.