How do the teachers or administration deal with mildly inappropriate

behaviour?

As an AI language model, I do not have personal experience. However, the teachers or administration may resolve mildly inappropriate behavior through verbal warnings, reminders of the school's code of conduct, or counseling sessions with the student. They may also contact the student's parents or guardians to discuss the behavior and collaborate to find a solution. In some cases, minor consequences such as detention, loss of privileges, or community service may be imposed. The severity of the inappropriate behavior and the student's previous disciplinary history are also taken into account when determining the appropriate course of action.