“Bad teachers are extremely rare,” according to decorated film producer, screenwriter, and English teacher Ellie Herman. But having seen her fair share of subpar educators, she found five common tendencies. One of them is having a noticeable dislike towards children. 

“The number one quality I’ve observed in bad teachers is that they do not seem to like children very much. In high schools, this means they do not seem to find teenagers charming, funny, or interesting—ever.”

Disinterest in the subject they’re teaching is another tendency among bad teachers, according to Herman. 

“If asked ‘why are you teaching this?’ will you respond ‘because it will be on the test’? Every teacher has dud lessons from time to time (believe me), but what I sense in the classrooms of bad teachers is that they have no interest in their entire subject.”

Beloved teachers have one trait in common: they care. They are genuinely invested in their students’ success. But some are already emotionally checked out, and Herman says it shows. 

“A central quality in truly bad teachers is that they seem to have stopped caring; this lack of engagement is reflected not only in their interactions with students (or lack thereof) but in their seemingly random choice of lesson topics.”

Teachers have their favorite students; however, it won’t be an issue if everyone receives fair treatment. It becomes a problem when these biases become evident. 

“The truly bad teachers I’ve observed tend to engage only with a small number of very compliant, eager students, ignoring the rest except to reprimand troublemakers,” Herman says.

However, there are people who see some benefit in having their kids learn under bad teachers. Author Linda Flanagan is a mother of three teenagers, and here’s what she’s observed. 

“An indifferent teacher can compel the self-motivated student to pursue his own interests,” she wrote in an article for HuffPost. “The teacher who spends class time devouring People while students fill out worksheets might not inspire, but she might prompt a little self-directed learning just the same."

Flanagan's example of a bad teacher is someone she describes as a "tyrant" and "petty dictator" who is more about control. She says having these people as mentors is a valuable experience when entering the real world. 

"These skills will come in handy when it's time to renew a driver's license, contest an insurance payment, or dispute a cable bill. Having a tyrant for a teacher helps young people appreciate why abuses of power must be resisted throughout life."

Flanagan also experienced what she describes as “the idealogue” when her son’s seventh-grade biology teacher pushed his belief in creationism onto his students. 

“It introduces kids to mankind’s endless capacity for self-deception. Warning: this lesson only applies when there’s a rational adult in the mix to provide a reality check.”