Increased usage of "text message speak" and street slang in essays has left UK teachers baffled, according to a study.
The study found that four-in-10 teachers couldn't understand some pupils' writing as it was laden with obscure language.
It was revealed that phrases like "innit" and Gr8 have become a regular sight in schoolwork.
In fact, one teacher actually claimed that how an essay contained the sentence "i noe u dnt noee mii,i donno huu u r" - I know you do not know me, I do not know who you are.
There was another student who wrote "ma m8s wnt ova" - my mates went over.
The situation has gone so far that in one case, four teachers had to mark a pupil's essay together because it was so confusing.
The survey of 500 teachers, commissioned by the satellite channel, Teachers TV, found that almost 55 per cent believed children's grammar was now worse than it ever was.
The study listed examples of street language found in an essay on Shakespeare, which included "Macbeth couldn't be arsed...", "Macbeth he is well wicked", "Macbeth was pure mental" and "Romeo was a numpty, wasn't he?"
In an essay on the Second World War, a pupil wrote: "Hitler was majorly bad."
"Pupils are increasingly communicating through colloquial language in the classroom, with some teachers accepting this as the norm. However, the correct use of grammar is vital if education standards are to be maintained and improved," The Telegraph quoted Andrew Bethell, Teachers TV chief executive, as saying.
Also, the study claimed that a large number of teachers were now picking up on pupils' phrases, but many of them are still confused.
Over 50 percent of staff couldn't recognise that "phat" meant "great", and nearly half did not understand that "klingon" was used for a younger brother or sister and a quarter did not know "vanilla checks" was slang for "boring clothes".