This 15~page unit consists of six activities that will enrich student understanding of double~digit addition and subtraction with and without regrouping. Formulating problems from randomly given numbers, dressing a snowman, mitten math, critical thinking word problems, and a winter wonderland game are all included! Guide students to developing an understanding of adding and subtracting with and without regrouping while enjoying the wonders of winter! Created for second grade, but also appropriate for third grade. A perfect addition to rigorous common core lesson plans!