Sit down and collect some things that you'd like to put in your teaching statement. Remember it's a statement of teaching philosophy, but also contains some of the practical things you do as a teacher that work well or go beyond the ordinary. Think about ideas from the books you've read for this course, and what you have found useful in practice.
Once you have your own ideas, read a few statements of teaching philosophy from mathematicians' websites. Bring your favorite and be ready to say what you like about it.