Hi Margaret:
I, too, prefer to create my own PPT slides as it helps me customize the slides to fit my order and sequencing of lesson material. I may use textbook images such as charts, graphs, diagrams, photos, or drawings, and occasionally, text if it's especially meaningful.
It's important that slides supplement the teacher, and not become the lesson itself. If that were the case, we could just print the slides and hand them out.
Regards, Barry
