Teachers: how do your style of speech and manner of expression change in front of a classroom?

Do you speak in shorter sentences than you do in your own normal speech, speak more slowly, draw out certain words for emphasis, use dramatic stage techniques, repeat yourself more? What do you do? (I’m asking “What do YOU do as a matter of your own practice?” and not “What does or should one do?” This is a question about your own style and not a request for advice.)

Or is your classroom style just like your conversational style, only louder?

And is it something you have consciously trained yourself to do, or does it come more or less naturally?

As a point of reference, what grade level do you teach?