Dave's down-to-earth rock shop /

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by Murphy, Stuart J.,
[ 01. English Non Fiction ] Authors: Smith, Cat Bowman,--ill. Series: MathStart Published by : HarperCollins, (New York, NY :) Physical details: 33 p. : col. ill. ; 22 x 26 cm. Subject(s): Set theory. Year : 2000 01. English Non Fiction Item type : 01. English Non Fiction
Location Call Number Serial Data Published Status Date Due
LM Montgomery Elementary School 511 MUR Available

"Classifying; Level 3."

As they consider sorting their rock collection by color, size, type, and hardness, Josh and Amy learn that the same objects can be organized in many different ways.