Researchers David Blazar (Doctoral
Candidate at Harvard), Erica Litke (Assistant Professor at University of Delaware), and Johanna Barmore (Doctoral
Candidate at Harvard) examined (1) the comparability of teachers»
value - added
estimates within and across four urban districts and (2), given the extent to which variations observed, how and whether said
value - added
estimates consistently captured differences in teachers» observed, videotaped, and scored classroom practices.
We use longitudinal data from Washington State to provide
estimates of the extent to which performance on the edTPA, a performance - based, subject - specific assessment of teacher
candidates, is predictive of the likelihood of employment in the teacher workforce and
value - added measures of teacher effectiveness.