Which level of classes is easier to deal with according to class management? elementary, middle school or high school? and why?

I believe that elementry class is easier to deal with rather than higher class, Because higher class teaching involve more techinical study and elementry class

difficult is elementary,...the class the higher is the easier...i think so. thanks.

 I agree with Mr Gayasuddin answers, thanks for the invitation. .

I agree with answer mr Mohammed