What about discipline them in classroom and in school environment? As i am going to a trainee teacher in sep.

Answer 1

Have detailed classroom procedures (don't call them rules). Explain to them how you want your class run from how to pass up papers to how to sharpen their pencils. I use a stop watch and give them specific times for everything. It takes 12 seconds to pass up papers, 7 minutes of silent reading...just be really specific and stick to it. Have assigned seats, a clear agenda posted on the board, and work that goes from bell to bell. They won't have time to get in trouble.
Don't embarass them in front of their peers. The first kid who does something a little wrong--take them outside and talk about what will happen in the hall. The others will get the point really quickly.
Parental contact is another way to get through as well.
Basically prevention is better than intervention. Check out Harry Wong's series (books and videos) "The First Days of School". Teaching is like training a horse. You can alway loosen up, but you can never tighten up.

Answer 2

have a few rules (4-5) and procedures for every situation you can think of from sharpening pencils to preparation for dismissal
have consequences and rewards
post the rules but not the procedures
be consistent
and rememeber "calm is power"

Answer 3

Hopefully not an English teacher...