Dave's down-to-earth rock shop /
Murphy, Stuart J., 1942-
Dave's down-to-earth rock shop / by Stuart Murphy ; illustrated by Cat Bowman Smith. - New York, NY : HarperCollins, c2000. - 33 p. : col. ill. ; 22 x 26 cm. - MathStart. .
"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.
98-032128
Set theory--Juvenile literature.
QA248 / .M78 2000
Dave's down-to-earth rock shop / by Stuart Murphy ; illustrated by Cat Bowman Smith. - New York, NY : HarperCollins, c2000. - 33 p. : col. ill. ; 22 x 26 cm. - MathStart. .
"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.
98-032128
Set theory--Juvenile literature.
QA248 / .M78 2000