noisy students

I've been blamed for having too soft and small a voice so as to convey authority and to make myself heard and respected by others, for instance by a class of noisy students. Even when I shout and get angry, other people tend to ignore what I say, including family relatives. What makes things...

Please Help Lord! The boss (headmistress) told me off twice in the last two days, mainly because I cannot handle noisy students; I really don't know what to do, but pray! May things improve.