Done at the schools in my city are done on computers and so all computers in the district get used at the same time and they then shut down at the same time.

There were many problems last year which eas disruptive because of the nightmare of scheduling everyone to teke the test when there are other things that need to happen at school like concerts, field days, guest speakers, etc.

Besides that, having primary age kids sit and take a test on a computer (where they cannot use many of the strategies we teach them for real case reading situations and math problems) is not developmentally appropriate.