Moore Public Schools graciously produced the following video which explains the inherent inequities between the Value Added Model and Student Learning Objective teacher evaluations frameworks.
http://youtu.be/dBXtDG8pXF4
Moore also presented this information to the Oklahoma TLE Commission:
http://youtu.be/lB_p5hFJfk0
Since I teach two sections of 7th grade literature, I part of my evaluation will be based on VAM, so I do not have to put together an SLO. However, my effectiveness will be determined by less than 30 percent of the students in my classes.