Instead of reliance on solely "objective" numbers, which, despite some claims to the contrary, is not the way most professionals are evaluated, the Briefing calls for "[d]istricts seeking to remove ineffective teachers [to] invest the time and resources in a comprehensive approach to evaluation that incorporates concrete steps for the improvement of teacher performance based
on professional standards of instructional practice, and unambiguous evidence for dismissal, if improvements do not occur (p. 20)."
The Briefing is attached here (with my highlighting) and is worth a read.. It contains an excellent and understandable analysis of VAM and a shorter description of the other methods of data analysis.
This post was also published on MUSE '13