You walk through the door of your classroom and get everything ready for your lesson. Students begin to come in and find their seats. It’s a familiar routine, but today you notice the differences between each student’s experience of the class. Some are early, neatly arranging notebooks ready to fill with thorough shorthand recording every word you say for the next hour. Others come in right at the last moment and eagerly scribble down the particularly inspiring parts. Still others slip in five minutes late, sit in the back with no notebook at all, and slip out again at the end of the allotted time. You wonder what it is that brings each of them through your classroom door—and that is where you have struck gold as a teacher.