This is an exceptional study book is a great aide to those who need to perfect their understanding in Metric Measurements. The only system used in international commerce and communication, and one becoming more and more prevalent in the U.S, it's becoming more and more important to have a firm grasp on the Metric system. Book 2 focuses on measuring length and perimeter using metric units, and includes scale drawing projects, calculating perimeter and more. 45 pages, paperback. Grades 5-12.