阅读下列材料，根据材料内容回答下列问题。

My name is Betty. I'm a student in Class 2. I have a good friend. Her name is Liu Fang. We are in the same school, but she is in Class 3. We have four classes in the morning. At 12:00 we have lunch at school. We have three classes in the afternoon. They are from 2:30 p.m. to 4:55 p.m. We have many subjects at school. My favorite subject is math, because my father says it is useful. I like English, too. My English teacher Ms. Wang is a great teacher. She is strict (严格的) with us. And she asks us to speak (说) English in and after class. We all like her because she is nice and she always helps us. Liu Fang likes music. She can play the piano (钢琴) well. She likes playing the piano in the evening. We like our school life (生活).