Possible Clues:

• Pupil's proper dress
• Classy outfit seen swimming in the water the same way throughout
• Teacher's place at university to create something for that classy outfit
• They teach others a lesson with university questionnaire? Part of this obviously goes over kids? heads in the classroom!
• What children may have to wear for lunch, if room so untidy
• A habit shared by those of many classes
• Habit that many educated youngsters will acquire?
• Dress that goes across the classes