I have completed B.Tech in Mechanical Engineering. I'm working as a teacher since various year after completing my degree and now also I'm working as a Mechanical Engineering expert to clear doubts of engineering students.As I have seen from many years, students have not much doubts if teacher clears their key concepts and lots of student stay away from main point of their subjects .It is a responsibility of good teacher to make strong base of students.In my experience I have teaches many students and observe their weakness and strength a lot .