The National Center for Research on Education Access and Choice (REACH), formerly known as the Education Research Alliance, released its first report after having been funded by Betsy DeVos with $10 million to study the effects of choice in schools. REACH used value-added methodology (judging teachers by the test score gains of their students to determine that those who got the highest VAM scores were likeliest to stay. It is safe to assume that these teachers were in the highest-scoring charter schools. On the other hand, the teachers with the lowest scores (no doubt, in the lowest-performing schools) were turning over at a high rate. The study’s conclusion is that (some) charters are keeping their best teachers (those with the highest VAM ratings) but (some) charters are not, which since they don’t get high VAM scores, is not a big deal.

We are excited to announce the release of the first study from the National Center for Research on Education Access and Choice (REACH). Naturally, the subject of this study is one that’s considered the most important factor in school success: teachers.

New Orleans is the first all-charter school district in the country. This makes the city the first where schools are held strictly accountable for performance, where many employers in close proximity compete for teachers, and where schools have the ability to respond to these pressures with almost complete autonomy over school personnel. If school reform advocates are right, we would expect these policy changes to produce major change in the teacher labor market. Did this happen?

To answer this question, researchers Nathan Barrett, Deven Carlson, Douglas N. Harris, and Jane Arnold Lincove compared New Orleans to similar neighboring districts from 2010 to 2015, using student test score growth to measure teacher performance. They drew the following conclusions:

Teacher retention is more closely related to teacher performance in New Orleans than in traditional public school districts. Lower performing teachers in New Orleans are 2.5 times more likely to leave their school than high-performing teachers, compared with only 1.9 times in similar neighboring districts.
The stronger link between retention and performance might imply that teacher quality would improve faster in New Orleans than in similar districts. However, this is not the case. The difference in average teacher performance between New Orleans and comparison districts remained essentially unchanged between 2010 and 2015. This is apparently because of the larger share of new teachers in New Orleans, whose lower quality roughly offsets the city’s advantages in retaining higher performing teachers.
The stronger retention-performance link in New Orleans is somewhat related to financial rewards, though not in a way that is likely to increase the overall quality of teaching. We find that higher performing teachers only receive pay increases when they switch schools, which may increase teacher turnover. High-performing teachers do not receive raises for performance when they stay in the same school.
These findings highlight the complexities of policies intended to increase the quality of teaching. Future studies will build on this work by examining how performance-based school closures affect the teacher labor market.

Read the policy brief here or the full technical report here.