Browsing All Posts filed under »Value-Added Teacher Evaluation«

The Endogeneity of the Equitable Distribution of Teachers: Or, why do the girls get all the good teachers?

April 18, 2014


Recently, the Center for American Progress (disclosure: I have a report coming out through them soon) released a report in which they boldly concluded, based on data on teacher ratings from Massachusetts and Louisiana, that teacher quality is woefully inequitably distributed across children by the income status of those children. As evidence of these inequities, […]

An Update on New Jersey’s SGPs: Year 2 – Still not valid!

January 31, 2014


I have spent much time criticizing New Jersey’s Student Growth Percentile measures over the past few years, both conceptually and statistically. So why stop now. We have been told over and over again by the Commissioner and his minions that New Jersey’s SGPs take fully into account student backgrounds by accounting for each student’s initial […]

The Value Added & Growth Score Train Wreck is Here

October 16, 2013


In case you hadn’t noticed evidence is mounting of a massive value-added and growth score train wreck. I’ve pointed out previously on this blog that there exist some pretty substantial differences in the models and estimates of teacher and school effectiveness being developed in practice across states for actual use in rating, ranking, tenuring and […]

Rebutting (again) the Persistent Flow of Disinformation on VAM, SGP and Teacher Evaluation

June 8, 2013


This post is in response to testimony overheard from recent presentations to the New Jersey State Board of Education. For background and more thorough explanations of issues pertaining to the use of Value-added Models and Student Growth Percentiles please see the following two sources: Baker, B.D., Oluwole, J., Green, P.C. III (2013) The legal consequences […]

Deconstructing Disinformation on Student Growth Percentiles & Teacher Evaluation in New Jersey

May 2, 2013


CROSS-POSTED FROM: Deconstructing Disinformation on Student Growth Percentiles & Teacher Evaluation in New Jersey (Printable Policy Brief): SGP_Disinformation_BakerOluwole Bruce D. Baker, Rutgers University, Graduate School of Education Joseph Oluwole, Montclair State University Introduction This brief addresses problems with, and disinformation about New Jersey’s Student Growth Percentile (SGP) measures which are proposed by New Jersey […]

Friday AM Graphs: Just how biased are NJ’s Growth Percentile Measures (school level)?

April 12, 2013


New Jersey finally released the data set of its school level growth percentile metrics. I’ve been harping on a few points on this blog this week. SGP data here: Enrollment data here: First, that the commissioner’s characterization that the growth percentiles necessarily fully take into account student background is a completely bogus and […]

Briefly Revisiting the Central Problem with SGPs (in the creator’s own words)

April 11, 2013


When I first criticized the use of SGPs for teacher evaluation in New Jersey, the creator of the Colorado Growth Model responded with the following statement: Unfortunately Professor Baker conflates the data (i.e. the measure) with the use. A primary purpose in the development of the Colorado Growth Model (Student Growth Percentiles/SGPs) was to distinguish […]