Inverted version: the students have no respect for their usual teacher Bob and regularly make his life miserable but Alan, who is experienced, knowledgeable in the subject, and strict but fair, almost immediately earns their respect and best behavior.
Inverted version: the students have no respect for their usual teacher Bob and regularly make his life miserable but Alan, who is experienced, knowledgeable in the subject, and strict but fair, almost immediately earns their respect and best behavior.