When the teacher said that the doll's math synchronization exercise was not brought, the parents should reply to the teacher like this: I'm sorry, because I was busy with work recently, the supervision of my child's homework was reduced, and I left in a hurry in the morning, and I didn't urge him to check whether the textbook and homework were brought together. I will strengthen the supervision of children's study and tell him that it is his own business to finish his homework and pack his schoolbag. As he grows up, he must do his own thing, be responsible for his actions, and thank his teachers for their care and supervision. Teachers can take the initiative to tell parents about their children, which shows the teacher's intention. We should affirm the teacher's concern, at the same time realize our own shortcomings, and actively correct them, and work together with teachers to realize home-school education.