By Hannah Weinberger, Special to CNN

(CNN) - People around the world were shocked and horrified by a viral video that showed Karen Klein, a 68-year-old public school bus monitor, desperately trying to ignore malicious verbal jabs by a group of middle schoolers on her own bus.

For most, it was extreme. For many educators and school staff members, it's no surprise.  School workers said it’s a regular aspect of their daily lives.

“I’ve had erasers thrown at me, among other things, but these are things that teachers go through,” said Rosalind Wiseman, author of the bestseller “Queen Bees and Wannabes.”

“When these types of things come up, there’s all of this attention. But most teachers have at least had one student call them a bad name under their breath."

While bullying among students has dominated conversations in school, homes and in the media, kids bullying adults at school is a topic rarely discussed. What some call misbehavior, pranks or insubordination can be bullying, too, educators said. Kids can act threateningly and create a hostile environment inside the limitations of the law, said educator and author  David M. Hall, who often leads anti-bullying workshops - and school workers might never report it.

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