This bundle of 3 lessons works to build student understanding of multi-digit addition by starting with conceptual understanding and base ten blocks. From there, students work to make connections between the standard algorithm and base ten blocks. Finally, students work to build fluency using only the standard algorithm. All tiers of plans include a scripted lesson plan, a graphic organizer, and 3 differentiated worksheets (Mild, Medium, and Spicy) to support student practice.