It's not anticipation. It's experience, either from questions you received during lectures you gave, questions you asked yourself in lectures you attented to,

It's not anticipation. It's experience, either from questions you received during lectures you gave, questions you asked yourself in lectures you attented to, or just road blocks you encountered while learning it on your own. Every time I get a question about something in a training I give, I make sure people will never have to ask me again (unless it's part of the flow of the lecture). Every time I asked myself something, or blocked on something, I make a mental note of it, whatever the subject is. Sometimes, years later, I just happen to teach that subject, and it comes back to me. I don't know why good teachers do that. Personnally, I started to do it out of anger. I felt like it was so unfair somebody failed to understand something because of a missing piece of information. I found it infuriating, it's a pain that has no reason to exist. We have been teaching things for centuries, why do we keep not communicating knowledge correctly ? Eventually I made peace with human imperfection, as I battled too much with my own, but the habit remains. Maybe obsession is what makes anybody great. It's not sane, but it's a hell of a motivation.