Terry formed a steering committee to realize the vision of defining teacher effectiveness.

He was the first researcher to measure teacher effectiveness by the learning gains of the teacher's students.

I agree that there should be some sort of required in-service program to enhance teacher effectiveness.

They have strong plans to measure and support teacher effectiveness.

But parents, students: Do you think test scores indicate teacher effectiveness?

But it is necessary for serious assessments of teacher effectiveness.

Research shows that teacher effectiveness is the most important in-school factor affecting student learning.

Research shows, however, that differences in teacher effectiveness as measured by value-added of teachers are associated with very large economic effects on students.

Most experts recommend using multiple measures to evaluate teacher effectiveness.

Second, how much variation in teacher effectiveness do test impacts miss?