This report describes various components of the process of disaggregating student achievement data and provides examples of each component. Information is provided to allow school districts to conduct their own school effectiveness evaluation. Results of the California Achievement Tests form one of the bases of the analysis. The underlying…

In spring 1986, new citywide testing programs in both reading and mathematics were implemented by the New York City Board of Education. In those cases where the test had changed, it was necessary to statistically equate the new tests to the old tests, so that comparisons of equated rather than actual scores could be made during the transitional…