This report examines the differences in impact estimates and standard errors that arise when these are derived using state achievement tests only (as pre-tests and post-tests), study-administered tests only, or some combination of state- and study-administered tests. State tests may yield different evaluation results relative to a test that is…

Survey results have suggested that, while teachers like to have test information available, most do not have great skill or consistency in interpreting test score data. Teachers who consider a certain type of test very valuable or useful are less likely to question the accuracy of the scores than are teachers who consider a test to be of little…