What you are training
Every fixture family throws a different kind of light, and a designer reads them the way a mix engineer reads a frequency band. A wash is soft-edged and wide and fills a stage without drawing a line; a spot has a hard edge you can shape with a gobo or a shutter; a beam is a tight, bright shaft that reads as a line in haze and barely lights a face. Knowing which is which by eye is the first skill of every focus call and every plot read, because the wrong family in the wrong position cannot be fixed with programming. This drill shows a target beam on a stage and asks you to rebuild it: choose the fixture family, then the shaping that produces the look. Six rounds cover the families a working rig actually carries, and the reveal explains what gave each one away.
After this drill, the plan: Your first sessions drill wash versus spot on faces, then add beam and blinder once the soft-edge and hard-edge families are automatic.