Being a teacher is not a part-time or side job. It may literally be, but if you are a teacher you must be fully involved with the kids you are working with and the subject matter they will be working with. This is especially pertinent if you are a teacher coming back from several years of not teaching. Teachers should always have the most up-to-date knowledge and information, and can easily do so by taking some classes themselves! See what's out there so that you can help your students see what's out there!