Every teacher who comes into my life has left me with many lessons, but my favorite teacher is the math teacher at secondary school. He is a strict person, my whole class is afraid to come his lesson. But thanks to that, I have trained discipline. He has a figure, he often wears a faded shirt and black trousers. The teacher’s briefcase holds a lot of good things, which are books, teaching tools, and tests. I still remember the memory of that day, I was the mischievous kid in class and was reminded by him. Once, he told me that I couldn’t get into a specialized school, at that time I felt a bit sad. But when I grew up, I found that thanks to it, I was more motivated to study, I finally passed. Now, he is retired. I often visit him every holiday. Thank you for teaching me so many things. He is one of my greatest teachers.