Dealing with students requires art because the students come from different backgrounds and are identified through the question and answer in the room and through students' answers to specific questions
Be flexible with your students under the limits of discipline and professional teaching decorum. Always maintain your position being un-controversial in any mean. Be honest in your duties, fair in exams and evaluations, and be a good respondents to the query of any student. Thereafter, a trust will be built. Students will think you being their mentor, friend, and caretaker.
Thereafter, every student whether new or old will respect you and will be under your control, at other side, you should be flexible with your students under some defined margins. Not all students should be dealt with the same method, they are human being, they have their certain confidential problems, they should be respected. Always appreciate them even on their small achievement, this will double their enthusiasm. Give them challenges, but never apply any strict punishment. This approach will grow their career in better way.