One of the most important things in education policy to keep an eye on is the first round of changes to new teacher evaluation systems. Given all the moving parts and the lack of evidence on how these systems should be designed and their impact, course adjustments along the way are not just inevitable, but absolutely essential.
Changes might be guided by different types of evidence, such as feedback from teachers and administrators or analysis of ratings data. And, of course, human judgment will play a big role. One thing that states and districts should not be doing, however, is assessing their new systems – or making changes to them – based whether or not raw overall test scores go up or down within the first few years.
Here’s a little reality check: Even the best-designed, best-implemented new evaluations are unlikely to have an immediate measurable impact on aggregate student performance. Evaluations are an investment, not a quick fix. And they are not risk-free. Their effects will depend on the quality of systems, how current teachers and administrators react to them and how all of this shapes and plays out in the teacher labor market. As I’ve said before, the realistic expectation for overall performance – and this is no guarantee – is that there will be some very small, gradual improvements, unfolding over a period of years and decades.
States and districts that expect anything more risk making poor decisions during these crucial, early phases.