Twitter response:

Day: July 7, 2017

Raising your voice usually accomplishes nothing but noise. 

Raising your voice and demanding obedience seldom accomplishes your intended objective.  Find ways to personally connect.  For example, take their face in your hands and say. “Look at my eyes and listen to me.”  Then firmly give the instruction you need to give.  A firm voice is not a yelling voice.  You need to connect to get through to the young mind.