A step by step guide (Starting with intro to tens and ones-place value) on teaching double digit addition and subtraction without regrouping. A GREAT way to stimulate your learners, with color indicators of where to start. The ones place is ALWAYS in "green for go". This is a lengthy Mimio, meant to span a few days of lesson plans. NOTE: You MUST have Mimio software in order to use/view this flipchart.