Put Pulleys to the Test

November 1, 2011

Gr 3-5-The first two chapters in each title are nearly identical, although there are occasional changes in the photographs and the examples used to define the concepts work" and machines. Subsequent chapters feature a specific simple machine and provide directions for basic experiments that children can accomplish, with the occasional exception, on their own, using easily located items. Final chapters explain that simple machines are everywhere. On the whole, the texts provide clear explanations and the experiments add a significant degree of interest. The color photographs are crisp and clear, as are the diagrams. Serviceable additions where the topics are a part of the curriculum.

Copyright 2011 School Library Journal, LLC Used with permission.

January 1, 2012
These books start with definitions of force, work, and machines, then explain how machines reduce the amount of force needed to do work. Interactivity is encouraged, as readers are directed to perform simple experiments along with children shown in accompanying pictures; the texts provide guidance on what to look for. Clear explanations, relatable examples, and effective visuals make these solid selections. Reading list, websites. Glos., ind.

(Copyright 2012 by The Horn Book, Incorporated, Boston. All rights reserved.)