Emergency substitute teacher certification is available in parts of the country where the teacher shortage is so acute that there aren’t even enough subs in the pipeline. It’s designed to get substitutes into the classroom fast, ensuring students don’t miss a single day of class. It’s the easiest and fastest way to start teaching in your area. If you are looking to work part-time or to make a little extra income on a more flexible schedule, and particularly if you are interested in working in a variety of environments, an emergency substitute teaching certification can be an ideal route to getting started in the profession.