Today we’re going to do something a little different. I’m going to hold up pictures
of different animals. Some of these animals will be yes examples of an idea
I have in mind. Some will be no animals. All the yes animals are examples of an
important concept that’s going to be at the center of what we study over the
next few days. The no examples are not examples of this concept, though they
98 The Strategic Teacher
may have some things in common with the yes examples. What I want you to do
is to examine each yes example and each no example to try and figure out what
the concept is. The name of the concept will be a start, but what I really want is
for you to determine the critical attributes of the concept.