How would a Lesson Zero story work in the Canterlotverse? Feel free to post your ideas on how it should be told.

It shouldn't... after all Celestia never asigned her to study the magic of friendship in any way.

Twilight, still, recalls how it was with her friends that they wielded the Elements of Harmony and free Luna from Nightmare Moon for she thinks that there is a connection between the two and tries to understands it but in a more personal and up close way that is not a school project.

You are right. This will not be like the television show that everyone knew about it.