A document camera is used to create a more accessible teaching for everyone. What you put under the camera is displayed via a projector or screen for everyone to see. Calculate, read, show student examples or experiments or show how to do a picture assignment. You can also use the document camera to record lessons for students to watch before a review or use for revision.
A document camera can also be used as a “live” image support where you reinforce your verbal instructions by pointing and showing how a task should be carried out, in a way that allows everyone to see.