Some students have revealed some of the most shocking things their teachers have done in front of them.

On media-sharing site Reddit, an anonymous poster asked school-age youngsters what the most outlandish thing they have seen their teacher do was.

And some of their answers were absolutely unbelievable.

One pupil responded to the question by recalling a totally cringe-worthy encounter when their female teacher quizzed a young lad about masturbation.

The poster wrote: “During a s*x ed class young female teacher was taking anonymous questions, and there was one about masturbation.

“And for some reason she called out a random dude to ask if he pulled or stroked. I’ve never seen someone more dumbstruck or embarrassed.”

Another student said his old teacher had accidentally started playing hardcore porn to an entire classroom by mistake.

He said his history tutor was going through VHS tapes trying to find the correct one when the X-rated material came on-screen.

The lad wrote: “Out of nowhere, one tape was a news segment, and then it went to static and scrambled and then BOOM! Clear as day, full frontal d*** into vagina. He was panicking!

“All our faces are so red we are about to explode in laughter. We didn’t know how to react. Pure silence in the room.

“He then says to our class ‘who wants some ice cream?’ We all were amped for that, and got spoiled for the remainder of the school year.”

But the worst of all these embarrassing things to happen in a classroom involves a teacher creepily over-sharing with his students.

The Reddit user posted: "He let it slip that his father took him to a brothel when he was 16 for his first time.

"He then made things more awkward when he pointed to a girl in the class and said that his first looked like her.”