“Class, what am I holding in my hand?” said the teacher who was very good at dealing with young minds.
A student near the front of the room was called upon and said, “It is a ten-dollar bill”
The teacher dropped the bill on the floor and stepped on it several of times, squishing it between her feet. The paper money was dirty and crumpled as she picked it up and handed it to one student. She asked each student to examine the bill then pass it around.
The teacher then asked the class what they had examined…