I think that it is unreasonable to expect 25 -30 kids to sit and work and not
make any noise. But when it reaches a point that you have to raise your voice
a lot to get their attention, that is too much. I don't care how well they
seem to be working. 1. There are probably students in there who are like you
and need a little quiet. 2. If they are working their mouths that much how
well are they working their brains on the work at hand?
Like you I have to remember that I am a very quiet person and need quiet when
I work but that some conversation is acceptable in a classroom. I also look
and listen to see if they are discussing the lesson at hand. That is a good
feeling. And if they are in a stage that does not require concentration ( some
sort of repetitious action), I don't worry as much.
But there is no need for a class to roar.