Dave's Down-to-Earth Rock Shop (MathStart 3)
Stuart J. Murphy (Author), Cat Bowman Smith (Illustrator)
Josh and Amy need to organize their rock collection—but how?
As they figure it out, readers learn the math skill of classifying, or putting objects into groups by attributes like color, shape or size. Using the Moh's scale of hardness to teach classifying, this book also provides some facts about rocks and supports the math and science curricula in an easy to understand manner.
Reading level: Ages 7 and up
Paperback: 40 pages
Publisher: Harper Collins (January 5, 2000)