Improving teacher evaluation is one of the most pressing but also contested areas of
educational policy. Value-added measures have received much of the attention in new …

The Every Students Succeeds Act (ESSA) loosened the federal policy grip over states'
teacher accountability systems. We present information, collected via surveys sent to state …

Studies link principal effectiveness to lower average rates of teacher turnover. However,
principals need not target retention efforts equally to all teachers. Instead, strong principals …

In 2009, the New Teacher Project's The Widget Effect documented the failure of US public
school districts to recognize and act on differences in teacher effectiveness. We revisit these …

Most prior research measures teacher turnover as an annual event, but teachers actually
leave their positions throughout the school year. We use data from North Carolina to …

MARCH 2015 133 2010) and for those who teach in tracked school settings (Harris &
Anderson, 2011; Jackson, 2012). The new tests created by the Partnership for Assessing …

Teacher evaluation systems that pair measures of teacher observation with measures of
student achievement or growth have become widespread. However, little attention has …

As states and districts implement more rigorous teacher evaluation systems, measures of
teacher performance are increasingly being used to support instruction and inform retention …

What does it take to be a good school principal? No two principals work exactly the same
way, but research shows that effective principals focus on a core set of factors critical to …

Research demonstrates the importance of principal effectiveness for school performance
and the potentially negative effects of principal turnover. However, we have limited …