In a demo lesson for a teaching position, make sure to create opportunities for students to think critically. This may sound obvious, but it can be difficult to maintain that space when you don't know the students and you're working in such a high pressure situation. For the members of the hiring committee I was on recently, this became a crucial factor in our decision. Here are some suggestions for making sure the students are doing higher order thinking in a demo lesson.
Be specific. Know examples of your work. Be articulate. Ariel Sacks gives tips for teachers going through job interviews.