Mr Li is one of my beloved teachers.He taught us physics when we were in Senior 1.He was old,but he taught very well.He could make his classes lively and interesting. Mr Li made good preparations for his lessons and was strict with us,too.Whenever we made mistakes in our homework,he would ask us to correct and do it again. I used to be poor in physics.  Mr Li often helped me with my lessons very patiently.Thanks to his help and hard work,I have made good progress and caught up with the class.As a retired teacher,he's still working hard for our educational cause(教育事業(yè)).