Whiteboards allow for teachers to set questions and assignments where the student has to draw the input.

This can be very useful for teaching or reviewing  characters letters and names of things even to the stage of saying draw eyes nose mouth and ears on an image.

The whiteboard can also be useful for drawing a map or geometric shapes in mathematics.

The above example is from two quiz questions in Moodle. similar things can be done in the assignment module so the student names draws or completes an image online with a computer, phone or tablet. the onle prerequisite is the hardware can go on the internet with some sort of web browser