Why Are Teachers Not Trained in Leadership?

We ask this question because clearly many of the job duties of a teacher are leadership duties and require leadership competencies.  We are dumbfounded that so few teachers are trained in leadership either in their training to become a teachers or in professional development courses after they are certified.  We have started this blog thread to ask sincerely why you believe teachers do not receive leadership training.  Librarians must take a leadership course to receive a Master’s in Library Science, but teachers have no such requirement.  We hope you will shed light on this important question with your comments?