This Common Core aligned interactive SMART Board lesson gets young students in K & 1 thinking about the subtraction process through hands-on manipulation and vocabulary use. Lesson includes a create your own subtraction story slide, word problems, writing in math using pictures and words, interactive manipulatives, subtraction sentences, a subtraction vortex game, interactive subtraction sentence bars, interactive flash cards, and a test prep slide.HOME SCHOOL USERS: Use the SMART Interacti