"With all the extras that teachers have on their plates, substitute teachers are and will continue to be in demand regularly. How can you, as the classroom teacher prepare your sub and best assure a productive, happy school day for everyone? You will want to prepare ahead of time so that you can have peace of mind about the care of your students. As a veteran classroom and substitute teacher, I've compiled a guide for you to use as a checklist to fill out each time you need to call a sub."