RE: Question 1: Your "A" team idea

Your idea is intriguing, Ivan. I don't think it would go over very well in too many schools.  You have to have staff buy-in, and this is likely to make the staff feel deficient. There could be a way to make it work, but I have to think about that. 

Often, schools labeled "low-performing" have some of the most creative teachers.  The API doesn't show this, and being called "low-performing" has an effect on morale.  

Personally, I prefer to teach in "challenging" schools.  It is never boring!  When I returned to public school teaching six years ago, I wanted to work at a particular school. It has a high transiency rate, and many homeless students.   I was thrilled when I found out they had an opening in my field (special education).   I left because I didn't want to work at a year-round school when my children got older and needed me during the summer. I continue to work at a "low-performing" school, with some of the best teachers in our district.