Physics is known for being a hard class, so students are warned on the door.
Concave (and convex) mirrors are studied in physics class. Various variables and their relationships are defined by this mural: Magnification is image height over object height or image location over object location. 1/object location + 1/image location = 1/focal length. Focal length = radius of curvature / 2.
Mr. Curtis the physics teacher is also the soccer coach, and their team was 2017 state champions. The back of the medal can be read in the mirror-- Don't get outworked.