I am going to agree with all of this, for the most part. I will say that over the last 10 years (and I've been teaching for 20), that I am seeing a HUGE amount of resistance to professional development in most teachers over 30. They simply refuse to adapt and incorporate technology into their work. In ANY other field, this would be considered CAREER SUICIDE, but in teaching it seems to be the modus oparnadi. Most teachers today are teaching FAR BELOW the level of their students, simply because they REFUSE to learn how to use tech that their students are already familiar with, in order to more effectively teach. I can't think of any other single profession in the 21st that has refused to adapt and update, more than teaching. I think there's a whole lot of teachers that will be replaced in the coming decade, who can't even muster the level of education that can be found on YouTube, or Kahn Academy.