I have a stepdaughter that does the same thing to me and my husband. We have just told her that if she thinks she needs to correct us she can form it in a question. Usually though, she is wrong lol. I would say that in this situation, he should be told that he was being disrepectful especially if he was saying it outloud without being called on.
Explain that he is very intelligent but that he needs to remain respectful to his teachers. I could see how this may be frustrating to the teacher.
Explain that he is very intelligent but that he needs to remain respectful to his teachers. I could see how this may be frustrating to the teacher.