College students are fun. I think of them as baby adults, and teaching them is a lot like being their mom for a semester.
There is nothing that equals the experience of working with people are committed to improving their personal life leadership and presentation skills. It's kinda like teaching gifted students. Their focus on moving forward gives them a genius quality.
I think that coaching is personalized, forward-moving teaching.
Coaching enables clients to solve specific problems. Teaching is more of connecting useful ideas to people with various levels of interest.
In your presentations, are you coaching or teaching? Probably both, depending on the commitment level of your audience. Consider taking more of a coaching approach when possible.