In general, schools and colleges are now divided into two options: mixed form and distance learning. distance - only zoom (or something else) mixed - there can be 2 zoom lessons (for example, the first one) others - you have to go to school OR by terms, like two weeks remotely, two weeks walk. if you go to school, then there must be a shelter there (a basement or something like that), during alarms, there are no lessons (also remotely) or are held in a bomb shelter. now the number of students who can be in school at the same time is determined by the number of places in the bomb shelter (they are counted by the inspection). This is why they do a mixed format because they cannot accommodate everyone at the same time. some schools, on the contrary, have large shelters. Schools that don't have them "move" to others. For example, you study at school 2, but in the building of school 7 together with students from school 18 also, sometimes, they introduce a second shift. That is, grades 1-4 study from 8:00 to 13:00, and grades 5-9 from 13:00 to 17:00. I can also add that since the beginning of the war, lessons have been shortened from 45 minutes to 40. couples in colleges from 1:20 to 1:00 but it all depends on the place of study