In 2012, I attended the ISTE conference in San Diego, CA. While I was only there for about 36 hours, it was easy for me to pick up on one of the hottest topics for the three-day event. The "flipped classroom" was being discussed in social lounges, in conference sessions, on the exhibit floor, on the hashtag and even at dinner. People wanted to know what it was, what it wasn't, how it's done and why it works.