With the Simple Machines Collection, readers will enjoy learning all about some of the most widely used simple machines. This bundle includes one each of the following 6 titles:
-Lever
-Wheel and Axle
-Pulley
-Inclined Plane
-Wedge
-Screw
Each of these 24-page books measure 7.5" x 10".

The Simple Machines series for grades 1-3 uses real-world examples of simple machine mechanisms, from see-saws to ramps to forks, to explain how basic mechanical devices, that are used for applying a force, can help make daily tasks much easier. Featuring before- and after-reading activities, a glossary, an index, and comprehension questions, this series helps young learners strengthen their reading comprehension skills while also introducing them to some of the most commonly used simple machines.