Many of our volunteers do not have any formal training teaching in a classroom setting. If this is your situation, it is important to remember that you are not there to replace a professional teacher. Your role is to supplement the curriculum that is already in place, and to provide more student-teacher interaction. Just be being in the school, you are making a difference by increasing attendance, teacher morale, and excitement about learning!
That said, where should you begin when you are teaching English?