Fourth grade artists studied the work of Italian artist Amedeo Modigliani. We discussed how art styles changed dramatically after use of the camera became common. Modigliani chose a style for his work, making figures look elongated, using bold color, placing them in a small space, keeping lines and shapes simple, and sometimes leaving out the model's eyes! The work was very unpopular at first, but eventually caught on and over a century later is collected by museums all over the world.
I originally found this lesson here: https://artlessonsforkids.me/2009/11/15/modigliani-self-portrait-in-grade-three/