Freshman Nicholas Brown takes a pre-geometry pop quiz with his classmates at Seton LaSalle Catholic High School, Wednesday, March 3, 2021, in the Mt. Lebanon suburb of Pittsburgh. (Emily Matthews/Pittsburgh Post-Gazette via AP)

Students learn in-person and virtually in Miss Courtney Choura's geometry class at Seton LaSalle Catholic High School, Wednesday, March 3, 2021, in the Mt. Lebanon suburb of Pittsburgh. (Emily Matthews/Pittsburgh Post-Gazette via AP)