These stories don’t involve diapers but may be interesting to you none-the-less.
Me and Miss Gordon
Alternately called “A New School Discipline.” A boy finds that the school has reinstated spanking and his favorite teacher is into it.
https://willnotwill.com/wp-content/uploads/2019/04/A-NEW-SCHOOL-DISCIPLINE.pdf
Trashed at School
A girl finds that misbehaving in the lunchroom has dire consequences.
https://willnotwill.com/wp-content/uploads/2019/04/TRASHED.pdf