When Making a Great Teacher is a Team Effort (Gotham Gazette, Mar 2012): "But Baiz, 29, knows that neither rating was accurate or useful. The TDRs violate basic rules of statistics because they assume that students are assigned to class rooms on a random basis, which is not the case. They also are riddled with data errors: In the case of Baiz’s ratings—he has received two TDRs in his teaching career—while both pegged him as “above average”, they both included likely errors in the value-added portion of his rating, the wrong number of students in his classes and a high likelihood that some of the students included in his assessment may never have been in his class.
Baiz’s unsatisfactory evaluation, on the other hand, captured his inexperience as a first-year teacher, as well as the effects of a family crisis that impaired his performance; however, the rating did nothing to assess—or foster-- his considerable potential."
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