If after giving a situation much thought, a teacher comes to the conclusion that a particular student has a behavioral or learning problem and feels that it will not be possible to deal with the problem without the involvement of the principal, his colleagues, or the student’s parents, then the teacher should speak to the necessary party without delay.
Condition of constructive speech is that the speaker’s intent be purely for constructive reasons and not out of anger or frustration. This could be extremely trying when the student in question is disruptive and frequently upsets the teacher.
Difficult as it is, teachers must not take students’ behavior personally. The disruptive student is, in most cases, not fighting the teacher, he is struggling with himself as he deals with the challenges of life.
Sefer Chofetz Chaim, 1 Kislev, page 170