Let the children take the initiative to go to the class teacher to admit their mistakes (if the math teacher is the class teacher, they can go directly), which is good for the children themselves and restricts them from making fewer mistakes.

If you don't give it, you may find your parents, so you have to explain the truth to your children when you go home. According to normal reasoning, the teacher should wait for the parents to leave, then go there to solve this matter calmly and go home to tell the children some truth.

I don't think it will make a big deal.