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 Enlarge One Grain Of Rice: A Mathematical FolktaleAuthor: DemiIllustrator: DemiPublisher: Scholastic PressCopyright: 1997ISBN: 0-590-93998-XNumber of Pages: 40Ohio Standards Alignment: Grades 5–10Rani, a clever girl, outsmarts her raja after he offers her a choice of reward for doing a good deed.  She requests that the raja give her one grain of rice on day 1, two grains on day 2, four grains on day 3, etc.  She requests that every day for 30 days he give her double the number of grains given on the previous day.  She teaches her greedy raja a lesson by using her accumulation of rice to feed her hungry village.Go to: How to Use This BookHighlights and InsightsRelated ORC ResourcesOhio Standards

 How to Use This Book This book can be used at a variety of grade levels. Younger students can be introduced to doubling patterns, while supplying them with a visual for the doubling process. Older students can be asked to write exponential equations to represent the doubling pattern. Tables and graphs of the equations can be made to enhance the understanding of exponential functions. Representations of the number of grains given each day and the total number of grains given after so many days can be explored. Graphs, tables and equations of different exponential situations can be compared. The doubling situation can be compared to other exponential relationships, such as tripling, quadrupling, etc. Students might compare, for example, doubling the amount of rice over thirty days and tripling the amount of rice over twenty days.
 Highlights and Insights Looking for patterns is an essential part of mathematics. This book helps students by introducing them to non-linear patterns that can be expressed in words, graphs, equations, and tables. This story helps younger students develop number sense and introduces older students to exponential functions in a most engaging way.