Jim Belushi in The Principal made a journey to a student's home. Morgan Freeman in Lean on Me journeyed to a student's home. The central features of this journey are always similar. The teacher knocks on the front door, sits down with the parents, and the teacher's eyes are widened to the condition in which the student is living his or her life. New lines of communication are developed.
Contact is made with the parents.
Following that hero's journey, the relationship between teacher and student is transformed. And as a result, the teacher acquires a transformational power. Just think about that scene from Dangerous Minds. The parents are surprised by Michelle Pfeiffer's character's visit, and assume she is the bearer of bad news about their son, Raul. Instead, she praises Raul, saying he is bright, funny, and articulate.