Rounding is such a key concept for students to understand. It is a skill that is used to determine the reasonableness of all other mathematical solutions. I have developed a series of two lessons that will help your kiddos master the skill of rounding. The first concept that is addressed is that of finding the halfway number. Once students understand this concept rounding just clicks. I have aligned my lessons to the Common Core Standards. Use these activities in conjunction with my rounding notebook freebie. Enjoy!