In this video, Michelle Rebidoux recorded a series of lectures for Religious Studies 3880 using the large studio monitor loaded with her slides while engaging directly with her students.
 

Here, Ginny Ryan uses a software called Octopus to interact and annotate her slides to produce an effective video on the aspects of writing.
 

The Content Author recorded her audio in the studio while speaking over her slides. The slides were then animated in post-production.
 

In this traditional approach, Dr. Norm Catto lectures directly to the camera while the producer switches between him and his slides.