Students stuffing microphones into their shirts, notes into their underpants and smuggling smartphones into exam rooms are just a few of the thousand ways they attempted to cheat last year's Higher School Certificate according to new data released by the Board of Studies on Wednesday.

Among the 75,000 teenagers who took the final year exam last year was a student who wired herself up through an earpiece and a microphone in her sleeve to get answers from a friend outside the exam room, while another tried to convince an examiner that reading off their smartphone in the middle of the exam was "rote learning".

Regulations require every school in NSW to record incidents of cheating for the HSC but plagiarism is becoming harder to detect. Credit:Rick Stevens

"What these kids forget is that while it might be their first time in a HSC exam room, teachers have been doing it for many, many years" the president of Board of Studies, Teaching and Educational Studies NSW Tom Alegounarias​ said. "So if it is the notes stuffed down the underpants, scrawled on the hands, or the earphone creeping up your ear, we've seen it all before."