what not to think, or if the thought occurs, what not to say, when teaching:
How could you not get this?!?
I assume parents and administrators frown on that type of comment directed towards students...
It seems we have done several lessons twice, in part because the explanation was not clear (clearly made or clearly received?) or the students became totally off track (poor instruction or poor understanding?) -- make sure the vocabulary and examples of the lecture/lesson/class practice match the text/worksheet/homework... if I use certain phrases or strategies in the lesson it needs to transfer directly to student independent work, they shouldn't see anything new/different when doing the assignment