This unit consists of 7 lessons to introduce and practice 2-digit addition strategies using word problems. There is also a math task to apply knowledge of addition strategies with a rubric. Each lesson includes the I do, we do, you do lesson format. Each interactive slide uses TINS or a bar model to organize your thoughts for the word problem, work space to try the strategies, a self-assessment slide, and differentiated centers. The centers I used for this unit can be found on k-5 math resources.