A recent article in Education Week discussed the potential wide-scale application of measures produced from Rasch models. The author of the article, Tom Vander Ark, cites the enormous mounds of fragmented, educational data currently available and the lack of a common scale for meaningful reporting and growth measurement. Vander Ark proposes using the widely used Lexile framework for reading and the Quintile framework for math to link scales and develop a system of comparable growth measures for students. Metametrics' Gary Williamson was quoted as saying "For the best measurement of student growth, the measurement scale must be: unidimensional, continuous, equal-interval, developmental, and invariant with respect to location and unit size. In fact, the Lexile scale possesses all of these necessary characteristics. So it is not only appropriate for the measurement of student growth, it may well be the most appropriate scale for the measurement of academic growth in reading".
Vander Ark, T. (2013). A proposal for better growth measures. Education Week. June 5. Available at: http://blogs.edweek.org/edweek/on_innovation/2013/06/a_proposal_for_better_growth_measures.html
Rasch Measurement in the News, June, 2013. T. Vander Ark Rasch Measurement Transactions, 2013, 27:2 p. 1418
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