HSC students are becoming increasingly brazen in their attempts to cheat their way to higher scores, with more than 300 instances of plagiarism recorded in the past year, new data from the Board of Studies reveals.

In one instance, a student, known by the pseudonym "Mr Bean," refused to give up on cheating, reading from different prepared notes on three separate occasions in one exam before having his grades revoked.

Others continued to access material on their phones during assessments despite persistent warnings.

Last year, the Board of Studies publicised the case of a student who failed her exam after she wired herself up through an earpiece and a microphone in her sleeve to get answers from a friend outside the exam room.