Police are investigating an Instagram account created to mock teachers at a school in Essex.
The deleted account poked fun at staff at King Edmund School in Rochford.
It is believed more than 300 people followed the page before it was taken down.
A spokeswoman for the school said the incident is being taken “extremely seriously”.
“We will not tolerate someone treating anyone else negatively, whether a member of staff or a student," she said.
"The police are investigating allegations of malicious communications and harassment, and the student responsible will be held accountable.”
The spokeswoman said such comments would once have been confined to the classroom and playground.
“Unfortunately, despite its positive aspects, social media has given a public platform to voice comments of this nature.”
The school has denied reports it sought to pursue the page creator for a hate crime.
Essex Police said enquires into harassment at the school are ongoing.
“We are investigating allegations of malicious communications and harassment, said a spokesman."
Rochford District Council vice chairman Terry Cutmore said the use of social media to abuse staff was “shocking”.
“If this is proven to be true, it is a shame they feel they have to take these routes to decry the teachers," he said.
“I think it is shocking that we are getting these claims. I think it shows we need to be up to date with social media and the affect it has on our society.”
King Edmund School has 1,500 students aged 11 to 18.