Finding the Missing Part

In our Math Program, EnVisions, we teach the students the part-part-whole method. In this method, students learn that in addition and subtraction, there are 2 parts and a whole. When adding, you add the two parts, such as 5+5, to get the whole, 10. In subtraction, you start with the whole, 10, and take away one of the parts, 5, to find the other part, 5. In this video, the students describe how they find the missing part. Enjoy! They did such a nice job explaining their thinking!