I teach at a community college and an exercise I sometimes do is place several objects on a table. The objects are at various distances from where the camera will be and arranged to allow two-shots, three-shots, etc.
I then have two cameras set at two distances from the table. The students go between the two cameras, practice focusing in on the items and seeing how distance from subject can affect depth-of-field.
Something we always did when I was first learning camera in the 60's. Was to hand items from ceiling, or whatever you can hang it from and swing it and follow back and forth from every angle needing to follow focus, and maybe zoom, we also trucked between items holding a shot, but no one seems to truck or dolly anymore.