when the middle school teacher is writing on the black board, the students have a great frolic time.. send notes by air to each other or whisper or anything else silly to prove who is more brave to dare the teacher.. but when the teacher turns back, they act well and behave.. the moment she turns again to the board, they are off.. ( a student has confessed this.. but it can't be used any proof for this discussion or anything else)
is there a scientific terms for this kind of behavior? is this serious or expected of any middle school class in USA (8th grade)?
is there anything the teacher can do about this? (to minimize this)