Does the teacher often talk big in class

Well, some big words. I often say that I am very good from time to time. For example, my former Chinese teacher, who was still a senior three, said that she was running around every day and then said that she was not a very vain person. She is a clever little girl teacher in front of her parents, like a bully in front of her students, and because she doesn't do her homework and attend classes, she immediately fires people, teaches two classes and fires nearly ten students.