Looking for a fun and engaging way to teach your students addition? Look no further than our Find the Sum to 20 using 3 numbers lesson plan! This lesson plan is perfect for helping students learn how to solve word problems involving adding three whole numbers. Students will use objects, addition properties, and drawings to solve the problems and will be able to use different strategies (i.e., chunking) to solve the addition. This lesson plan is sure to be a hit with your students and will help them master addition in no time!