The activity in a class room differs from activities in a canteen, sports hall or corridor. Each space needs to have a specific acoustic solution based on the activity.
The 'Acoustical Society of America' wrote an extensive report on class room acoustics: 'Quiet Classrooms'. It is written for architects, teachers and planners involved with the building or renovation of school buildings. An interesting document that is not meant to replace the acoustic advisor but it gives valuable insights in the terminology and guidelines on how to create a “healthy classroom”.