Check the student list prior to the workshop, and drop them an email if you need clarification.
If this is the case, explain to the student they should have a backup in case we don't have a coach. We do mention this in our student guide.
If you want you can send a tweet/slack message asking for a coach to help with these skills. I feel this a good thing to do, to go that extra mile, but it's completely up to you.
There was a discussion on Wednesday about students who turn up with really advanced or niche topics and there are no coaches to help them.