Over the past decade, substitute placement software has transformed the landscape of substitute teaching. Rarely is a substitute teacher roused from bed with early morning calls. It’s now common for subs to be notified of open jobs, which they can accept, reject, or cancel via smartphone app or computer. Substitute teaching is in high demand and jobs are plentiful. Subs who work in multiple districts have access to enough jobs to choose from a wide variety of subjects and grade levels.