This team’s latest math-related book will be greeted with cheers by teachers everywhere. In clear, concise language, and using examples familiar to children, Adler introduces readers to fractions and makes them easy to understand through his use of repetition of vocabulary, examples and explanations, as well as hands-on activities. Beginning by introducing the concept of fractions, the text moves to using the terms “numerator” and “denominator” and next demonstrates what happens when each of these increases or decreases while the other remains constant. Readers will learn how to make equivalent fractions and how to add and subtact fractions that have the same denominator. Adler also touches on the confusing concept that 1/12th of one thing might be smaller than 1/15th of another thing. Throughout, Miller’s computer artwork crisply and cleanly illustrates each concept, using a clown and magician birthday motif. An excellent resource for elementary classrooms, this should find a home in any library. *(Nonfiction. 6-10)*