This exciting workbook explains The ClockWise System for mental math with fractions, decimals, percent and degrees, laying them out in equivalent places on a 12-hour analog clock. The book takes the reader through easy-to-grasp steps, using colours to help the reader associate patterns, and crystal-clear graphics to illustrate each idea. It builds on each preceding idea so that the reader feels the discovery unfold before her eyes. The whimsical snapshots of kids and adults throughout the book invite the reader to join this wonderful community pouring out of the pages. The ClockWise System also features lots of reproducible pages for classroom use, to practice comparing fractions to other fractions, or fractions to decimals, or to percents, as well as practice estimating angles at a glance. Most math classes teach fractions on pizza, or sometimes on quadrilaterals, while decimals are usually taught as rods of ten, and square grids of 100. Thus many people think fractions and decimals are entirely separate concepts.The ClockWise System's consistent approach from one chapter to the next makes the connection between these measurements and portions seem natural and instinctive, just like our understanding of the analog clock, which happens to be shaped very much like a pizza. This book is just as enjoyable for adults or kids to read and to adapt the mental math habits it teaches. While it is a workbook, its beautiful, durable laminated cover will protect it for many years, and both front and back covers fold out to reveal a blank clock for visualisation, and an astoundingly beautiful "Clockulator" diagram that pulls the entire book together into one lasting image. To top it all off, the book comes with an 11 X 17 poster of this same Clockulator.