A good teacher is a good companion on the journey of students' life and an instructor helping them make the right choice in life.Teachers are the greatest people in the world，because they teach students not only how to read and write，but also how to be a real man. They are also kind to everybody and they do not want anyone to fall behind others.When students are in trouble，they help them in time.Surely the most important quality of a good teacher lies in his sense of responsibility and love for his students.