Teachers matter. They have an extraordinary, positive, and lasting effect on their students. Students with high-performing teachers can progress three times as fast as students with low-performing teachers, and each student deserves access to highly effective teachers in every subject.
So, how do we know which teachers are effective? All teachers deserve a fair and accurate assessment of their skills, how they perform in the classroom, and how they can improve. Teacher effectiveness is dependent on these accurate and fair evaluations that are based on multiple measures, including—but not solely based on—their students' performance in the subjects they teach.