(Trent Nelson | The Salt Lake Tribune) Students line up for COVID-19 tests as they return to Highland High School in Salt Lake City on Monday, Feb. 8, 2021.(Trent Nelson | The Salt Lake Tribune) Science teacher Robert Campos wipes down desks in his classroom as students return to Highland High School in Salt Lake City on Monday, Feb. 8, 2021.(Trent Nelson | The Salt Lake Tribune) Science teacher Robert Campos wipes down desks in his classroom as students return to Highland High School in Salt Lake City on Monday, Feb. 8, 2021.(Trent Nelson | The Salt Lake Tribune) Teacher Grace Floyd makes lesson plans as students return to Highland High School in Salt Lake City on Monday, Feb. 8, 2021.(Trent Nelson | The Salt Lake Tribune) Jane Erickson hangs a welcome back banner with help from Lavell and Olivia Manavahe as students return to Highland High School in Salt Lake City on Monday, Feb. 8, 2021.(Trent Nelson | The Salt Lake Tribune) Students return to Highland High School in Salt Lake City on Monday, Feb. 8, 2021.(Trent Nelson | The Salt Lake Tribune) Students line up for COVID-19 tests as they return to Highland High School in Salt Lake City on Monday, Feb. 8, 2021.(Trent Nelson | The Salt Lake Tribune) A social distancing marker in a hallway as students return to Highland High School in Salt Lake City on Monday, Feb. 8, 2021.(Trent Nelson | The Salt Lake Tribune) as students return to Highland High School in Salt Lake City on Monday, Feb. 8, 2021.