DEFINITELY....I never cease to be amazed. Sometimes I even switch my CI off to see how well I could follow the teacher without it and its like comparing apples with oranges. What I find the most helpful is working when the calculus teacher is explaining a question WHILE writing it on the board, and I can copy it down, and "follow" the steps he is explaining without having to stop to lipread him THEN try to write down what he's writing (and while writing it down, miss what he's saying.) The "real time" explanation factor makes a huge difference in my understanding the entire problem.
That's what I do for my Finite Math class!