From School Library Journal
Grade 1-4–Goldstone adds another winner to the growing canon of titles that make learning math concepts both fun and interesting. Combining clear, concise language with colorful photos of countable objects, he introduces estimation, beginning with eye-training exercises to recognize groupings of 10s, 100s, and 1000s. Readers are encouraged to move the book around so they can see the items from varying perspectives. The next few spreads explain how to base an estimate on quantified groups: left-hand pages show clusters of an object (10 cherries, 100 cherries) while right-hand pages present an unidentified amount of the same thing (About how many cherries are in a quart?). The author then shows youngsters how to make reasonable estimates when looking at large quantities using clump counting and box counting. The real standout here is the crisp photography of objects and animals, including everything from google eyes to a penguin colony, set against stark white backgrounds that make them almost seem to leap off the page. This well-designed book will add zing to many a math lesson and attract browsers as well.–Grace Oliff, Ann Blanche Smith School, Hillsdale, NJ
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Estimating techniques introduced in Stuart J. Murphy's MathStart titles Betcha!
(1997) and Coyotes All Around
(2003) are kicked up a notch here thanks to jaw-dropping color photos. Laying out a mixed assemblage of toys, pipe cleaners, marbles, peanuts, and other small items, Goldstone helps viewers train themselves to estimate the size of groups of about 10 things on sight, then goes on to present similar, often fetchingly arranged, materials by hundreds and (!) thousands. He also describes "clump counting" and "box and count" methods, offering pages chock-full of plastic bugs ("It isn't gross--it's a
gross."), dog and cat stamps, a penguin colony, tiny rice grains, a bowl of jellybeans, and more. Including hints for each exercise, and frequent reminders that the goal is a "reasonable estimate," not an exact number, this book lends itself equally well to skill building and to casual reading. John PetersCopyright © American Library Association. All rights reserved