Back when I started instructing, I always have to have PPT to teach. Without them, well, I just couldn't teach. But somewhere along the way, I learned that when I teach information technology and lean heavily into the 135 slide PowerPoints, I created a dependence on them. And it was evident, particularly when the projector stopped working. So, I started getting away from them. I pared them down to the 5-bullet, 10 slides per 20 minutes rule as a start. Eventually, though, PowerPoints de-evolved to more trouble than they are worth for most teaching situations. The reason: I want students to pay attention to me and my antics while I teach, rather than look on the board at my goofy slides. I found it a lot better to connect with my students if I talk to them, not just broadcast to the air. The instructor or better yet, the student is the star of the show. Content should come from the instructor, the student, or both working together, rather than slides. If used, I would recommend them only minimally. PowerPoints need to be scripted to keep the instructor on track - sorta like an agenda of the lecture and lecture is one of those delivery methods that should only be used to convey concepts, terms, definitions, and whatnot. There is no earthly reason why PowerPoints should take the place of lecture by having them populated with all the material in the lecture. If that's the case, why come to class - why not just read a book? I am a big fan of Active Learning styles which really move away from lecture and go to methods where students create their own content. I know there are instructors out there that are worried about making them better. What I would suggest is, rather than focusing on making the PPT's better, improve your own skills and then, let the students revel in your awesomeness. And when PowerPoints become totally useless because your teaching is active, you'll save time not having to make a slide deck for every lecture. That's just my 2¢.