I have been a teacher for over 20 years. Do you know how many times I have been truly inspired by professional development? Well, you can count them on two hands. The other hundred or so times, I felt worse than I did when I entered the sessions. The words “bored,” “frustrated” and “irrelevant” come to mind.  18 billion dollars are spent on professional development in the US each year. With such a hefty price tag, it must be working,…