This is one SMARTBoard Lesson with one printable for teaching adding 2-digit numbers with and without regrouping. This lesson involves using base ten blocks to solve problems. The lesson includes a worksheet for each child to practice independently at the end of the lesson.
I created this lesson for the Common Core Standard 1.NBT.4 - add within 100, including adding a two-digit number and a one-digit number, and adding a 2-digit number and a multiple of 10, using concrete models or drawings a