We teach through powerpoints. A new lecture every week being that it's a vocational school we have alot of lecture to cover making it impossible to have just 5 main points on one slide. What could be another tip to powerpoints and make sure things are being covered and I don't loose the student's focus?

As an adult vocational school we don't do many field trips or have many guests speakers. Our subject is dental related. What can I do besides sharing my own office expieriences to keep students excited and interested?