Has anyone participated in something like this before? Any clue to what might happen on the day? Interviews are straight forward enough, but I'm quite wary of the essay and the team learning session. What can I do to prepare?
Some (like Towelie, he likes to follow me around on these threads, he'll probably be in shortly) might suggest not doing any prep and just going in as you are to give them the most real and down to earth variation of your self.
This doesn't work for me, although it may work for you, just have to experiment with any or all of these suggestions on this thread and pick what fits and prepares you best.
What I do is the following:
1.) Know yourself: PS, secondary essays, your research and publications if you have any, your extracurriculars - why you do them and what they actually are and what you learn from them, your clinical volunteering, etc.
2.) Know that which is not yourself: Current events, bioethics, healthcare, etc.
I prep for the worst case scenario - you get an interviewer who is a jerk and bombards you with case studies of bioethics and healthcare and tears your app inside out asking you the tough hard hitting questions instead of the norm, which are interviewers who just want to get to know you better conversationally.
The latter is much more prevalent, which is why there are people on this thread who would say all this prep is unnecessary and will just make you sound dull and rehearsed.
I am by no means advocating scripting responses or being a drone. I am advocating preparing for a subject by reading and studying the background information and then forming your own opinion on the matter. I had a tough bioethics/healthcare interview, and if I hadn't done all this prep I would have failed utterly. Honesty and humility are key, prep does not give you the right to BS your interviewer. There are definitely times where a "that's a great question, I don't know" is a good response.
Being prepped actually relaxes me so it is good for me. May stress you out and just jumble your mind. You just have to experiment and see. Also I didn't have much education on healthcare or bioethics issues so I found this approach to be most helpful as well.