So knowing your audience is extremely important to you?
That’s the only way you know you’re communicating. Otherwise you’re just giving a lecture, you’re facing the board and talking to the board, and people in the classroom behind you have to meet you at the board.
The educator who says ‘Oh, these people just don’t have an interest in learning’ should just be fired on the spot.
I would also add those educators who say, “I’m not very good with (math|computers|English|etc)”. Read the full interview for an interesting take on reaching the unreachable.