Learning Teams...What's the Problem with a Little Support?

I had never heard of this team learning prior to the class presentation and various articles which I read, as well as the powerpoints. From all that I have gathered, I can't see why this approach/tecnique should draw any opposition. It seems that the team learning approach is a win-win situation. School systems/districts would benefit in that they would be retaining good/veteran teachers while encouraging new teachers to join the team and most importantly...STAY! As pointed out in the article Learning Teams:Creating What's Next,"the U.S. will lose 1/3 of its veteran teachers during the next 4 years and more than 1/2 in less than a decade. At the other end of the spectrum, beginning teachers are being driven away by antiquated preparation practices, outdated staffing policies & inadequate career rewards."
It would seem to be by utilizing this team approach new teachers would be working with veteran teachers, student teachers working with actual in class teachers as well as interacting and being involved with students in the classrooms, and allowing new teachers to be creative. When I was in nursing school, we had to perform clinical rotations in the various settings or topics that we were currently studying. For example, when we studied the area of adult/pediatric intensive care we had to work in that hospital setting with actual patient assignments and take on the duties/resonsibilities as the nurse for that patient for that 8 hour shift and did that for that whole term. That applied in the areas of psychiatry (inpatient, outpatient, child, teen or adult), we were in labor and delivery areas, emergency rooms, and even home health care. This is all to say that as we studied an area we also had a hands on experience in order to give us exposure and make us aware of the different areas and what that area/field may involve.
This learning team approach I believe equates to teacher preparedeness. Also pointed out in the article Learning Teams..."retention results in improved student learning." Teachers feel supported and not overwhelmed or bogged down. Teachers would be more apt to be happy or at least content in their careers and as further pointed out in the Bank School College of Education video,as stated by Jon Snyder. "research has shown if you have a really talented teacher, a really expertly prepared and supported teacher the kids do better." Isn't the bottom line the education of our children ? In turn the preparation of the future? In order to make them GLOBALLY prepared? To me, the question of funding, teacher preparedeness/development should all lead to the end result of adequate, if not superior, education. Once again, as pointed out in Learning Teams "it is time to build a 21st century educatin system." This would have to start from having those funds available to train teachers and support continuing ed programs in order to stay abreast of new techniques and updated technology therefore leading to innovative and creative teaching approaches thereby encouraging students and hopefully resulting in increased testing scores.