Teacher Tu, the math teacher in our class, has a special "hobby", that is, grabbing classes. She is fifty or sixty years old, and her hair is covered with white hair. Small eyes with a pair of Phnom Penh reading glasses, dressed very simply. She looks very gentle, in fact, she is not so gentle and often hits people, but she is my teacher after all! Not only do I not hate her, but I also like her, because she is so selfless, just like Bao Qingtian. She taught me for three years. Once, a science teacher was talking about air with relish. The students listened attentively, but they couldn't hear any noise. Suddenly, a "ride" appeared on the way. Teacher Tu came in with a textbook in his hand and smiled. Nine times out of ten, the students have estimated the purpose of Teacher Tu. I saw Mr. Tu and the science teacher talking, and the science teacher walked out of the classroom. Teacher Tu smiled and said, "There are several problems here. Please keep this mark. This is good for you. Let's talk about it in this class. " There was silence in the classroom. Before the students could react, Teacher Tu began to speak with relish. Everyone was in high spirits and couldn't listen to a word. Another time, the students were anxiously waiting for the music teacher to come to class when a familiar figure came in. Ah! Teacher tu. Teacher Tu smiled and said, "This class has math." Speaking of classes. At this time, the music teacher just came in and shyly withdrew when he saw someone. I thought to myself, "We haven't had a music class for weeks, so I'm afraid we …" The teacher encouraged the students to say, "Persistence is victory." After that, I began to give vivid lectures. Everyone is frowning, but it is not easy to vent, so we have to "bear the burden of humiliation." How to treat our math teacher who loves to "rob" classes?