Several states have recently adopted or are pursuing policies that deny or revoke tenure from teachers who receive poor evaluation ratings over time based in part on quantitative measures of performance. Using data from the state of Florida, we estimate such value-added measures to consider the future effectiveness and number of teachers who would…

This policy brief, a quick look at some aspects of the debate, illustrates the differences in New York City public schools that would result when layoffs are determined by seniority in comparison to a measure of teacher effectiveness. Due to data limitations and an interest in simplicity, this analysis employs the value added of teachers using the…