What should be put in the final slide when preparing teaching presentations? When preparing my PowerPoint slides for a lecture, I often find myself wondering what to put as the final slide.

For presentations in industry, when not in a university setting, I often have a final slide which simply says "Thank you." The intent is to thank the audience for attending the presentation. However, this feels a little out of place in a university setting, especially where students may not have a choice of attending (well, the choice is attend or definitely fail).

So, I started using a final slide that says "Questions?" However, I recently read something indicating that a teacher should not ask if students have questions (the teacher should either ask a probing question to check for understanding or the teacher should simply expect the students to speak up without prompting).

It seems the final slide should somehow indicate that the slides are done and doing that with a content slide does not seem right either. I recently started using a final slide indicating what homework was expected of the students before the next class session (sometimes the slide simply says 'no homework'). This works several sessions into the semester once students see that every time the homework slide appears it is the final slide; however, it does not really work well at the start of the semester.

Returning to my question, what should I put as the last slide?
Take a cue from TV. Pretty much every serial show I watch ends with "next time on..." It is simple, not prone to misunderstandings like trying to be funny, and actually serves a purpose of indicating what the students might look at before they come in for the next lecture. This is how I wrap up my lectures even though I do not use slides in the classroom. (I like to juggle multiple columns of coexisting text on a blackboard instead.)