well i would hope schools were built with some reinforced areas especially in tornado alley
about all i know about tornadoes is my sister told me she was driving into town one day and all these cars were pulling over and people were headed indoors. she was new to the area and didn’t understand then she looked out her side window and a tornado was coming at her not too far away. she said she peed her pants literally and headed for the nearest building she had seen other people headed for.
However due to the ADA requirement for elevators, most public buildings opt for above ground safe rooms.