GLASGOW, SCOTLAND – MARCH 15: S1 to S3 pupils attend Rosshall Academy as all pupils in Scotland return for some class time ahead of the Easter Holidays on March 15, 2021 in Glasgow, Scotland. Scotland allowed its secondary school students to return to classrooms part-time today after having closed schools to most pupils due to concerns over the spread of Covid-19. Students are required to wear face masks on campus and lateral flow Covid-19 tests are offered twice per week. (Photo by Jeff J Mitchell/Getty Images)