One day while we were studying the solar system in my fifth-grade class one of the students posed an intriguing question about comets. Because I like to show the class that learning is a fun, lifelong process, I told the young gal, "That's an excellent question. I don't know the answer. I wonder where we could find out."

Her response was sincere disbelief. "You don't know? I thought teachers were supposed to know *everything*!"

A slow grin crept over my face as I prepared to give my "learning is a life-long process" speech. But before I could get a word out a student from across the room blurted out, "Yeah, but he's only a fifth-grade teacher."