Boston school officials during the 2007-08 school year publicly voiced their concerns after approximately 25 percent of seniors at MATCH Charter School departed for Boston public schools, with some students showing up just a few weeks before graduation.
Just for a reminder, MATCH is the school in Boston that has a residence on the third floor for a cadre of recently graduated from college tutors in addition to their regular teaching staff, so this is pretty much the maximal example of what you can do with a full court press of TFA types.
Also, they've got the flashy "at least 2 AP and 2 university classes" to graduate from high school requirement, which obviously explains a lot of the transfer rate. It is a stupid stunt, the the results were completely predictable.
BTW, if the Common Core standards go through, will individual schools be allowed to have graduation requirements significantly in excess of them in English and Math? If so, what's the point?