In reading Ronald Barth's article The Culture Builder I had a question I am wondering about. Barth argues that the most important goal that we should have for our graduates "is some evidence that that this youngster is becoming or has become an independent learner." And that more so is that each of us in our community are independent lifelong learners. My question is then, does it matter what our teachers are choosing as their continued professional development or is it enough that they are simply continuing their learning? To me it seems that I would be as much better an educator for choosing to learn a musical instrument or a foreign language as I would be taking mastery classes on say differentiation. Some of the teachers would still choose to focus on differentiation or assessment. What if the professional development goal for each of your teachers was to learn something new and present their growth at the end of the term, given the one hour a week (?) ...