Recent work has included several studies related to value -
added measures of teacher performance, teacher effectiveness in the early grades, school choice, teacher mobility and special needs identification.
By taking into account multiple accurate, data -
rich measures of teacher performance and student growth, the model ensures that all teachers receive fair, meaningful, and reliable evaluations.
What little we do know about SLOs at this point, however, is two-fold: (1) «no studies have looked at SLO reliability» and (2) «[l] ittle is known about whether SLOs can yield ratings that correlate with
other measures of teacher performance» (i.e., one indicator of validity).
Additional limitations of the analysis highlighted in the paper and simply repeated by the reviewer are that the number of country observations is limited to 28 OECD countries and that the
available measure of teacher performance pay is imperfect.
[10] They find that given the correlations we typically see among
different measures of teacher performance, there is likely to be a significant number of false positives and negatives: teachers falling into one performance category according to one measure and into a different category according to another measure.
[19] At the other extreme, reliability of zero means that any
given measure of teacher performance tells us nothing about what the measure will be for the same teacher the next time.
Over time, I think we'll see more
sophisticated measures of teacher performance developed that include surveys from parents and students, action research projects where teachers document the impact of their own performance and some form of peer review.
Because value - added measures adjust for the characteristics of students in a given classroom, they are less
biased measures of teacher performance than are unadjusted test score measures, and they may be less biased even than some observational measures.
States and districts should develop frameworks for teacher performance appraisal that are based on research - supported best practices, consistent in application, fair to teachers and evaluators, and valid and
reliable measures of teacher performance.
The Marzano Teacher Evaluation Model was developed to provide both a fair and
accurate measure of teacher performance and also an instructional framework that empowers teachers to take control of their own growth.
These new teacher - evaluation systems incorporate
multiple measures of teacher performance, including value - added metrics based on standardized tests or teacher - designed assessments and, in some cases, student feedback on teacher performance and peer evaluations.
This component makes up 50 and 75 percent of the overall evaluation scores in the districts we studied, and much less is known about observation -
based measures of teacher performance than about value - added measures based on test scores.
44 Further, a recent study found weak to nonexistent relationships between the results of value -
added measures of teacher performance based on standardized test scores and some other measures of instructional quality.
Second,
other measures of teacher performance, such as principal evaluations, student ratings, or classroom observations, may ultimately prove to be better predictors of teachers» long - term impacts on students than VAMs.
In analyzing these results, as well as other survey data, the nonprofit Center for American Progress (CAP) determined that teachers are more likely to support programs that rely on a variety
of measures of teacher performance, rather than those that rely on only one measure (such as test scores).
The National Board's researchers rejected the use of student test scores as
a measure of teacher performance, claiming, «It is not too much of an exaggeration to state that such measures have been cited as a cause of all of the nation's considerable problems in educating our youth....
Andy readily admits that he's still stuck on denial, and from there he raises a big question that we've heard in other critiques of the report: Can we really trust
the measures of teacher performance we used to reach our conclusions about professional development?
Also, the report suggests, they should incorporate multiple
measures of teacher performance, and the measures should be weighted most heavily on objective evidence...
Brian Jacob's research from Chicago shows that principals dismissed more non-tenured teachers when a new system made it as easy as clicking a button in a computer system, and that those dismissals were related to
measures of teacher performance, including evaluations.
IMPACT implemented uniquely high - powered incentives linked to multiple
measures of teacher performance (i.e., several structured observational measures as well as test performance).
When we talk about «accurate»
measures of teacher performance, researchers mean measures that are valid and reliable.
In this brief, we will show how existing research can help district and state leaders who are thinking about using multiple
measures of teacher performance to guide them in hiring, development, and retention.
Although many states and districts agree on the need to, there is no universally accepted method for translating student achievement growth into
a measure of teacher performance.
The preliminary report focuses on two
measures of teacher performance: value - added analysis and student surveys.
While all measures of teacher effectiveness are imperfect, the focus on misclassification has intensified recently with the use of value - added measures that rely on statistical means of translating student test scores into
a measure of teacher performance.
A Measure of Teacher Performance Creation of growth models and increasingly focused attention on academic growth as the basis for accountability has highlighted the question of how student growth is related to teacher performance.
When used in conjunction with principal observation and other
measures of teacher performance, VAM increases the validity and reliability of the evaluation process and contributes to improvement of educator evaluation systems, according to the report.