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Value-Added Systems

Value-Added Systems. Dr. Robert H. Meyer Research Professor and Director Value-Added Research Center University of Wisconsin-Madison April 15, 2011. Value-Added Model Definition.

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Value-Added Systems

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  1. Value-Added Systems Dr. Robert H. Meyer Research Professor and Director Value-Added Research Center University of Wisconsin-Madison April 15, 2011

  2. Value-Added Model Definition • A value-added model (VAM) is a quasi-experimental statistical model that yields estimates of the contribution of schools, classrooms, teachers, or other educational units to student achievement, controlling for non-school sources of student achievement growth, including prior student achievement and student and family characteristics. • A VAM produces estimates of productivity under the counterfactual assumption that all schools serve the same group of students. This facilitates apples-to-apples school comparisons rather than apples-to-oranges comparisons. • The objective is to facilitate valid and fair comparisons of productivity with respect to student outcomes, given that schools may serve very different student populations.

  3. A More Transparent (and Useful) Definition of VA • Value-added productivity is the difference between actual student achievement and predicted student achievement. • Or, value-added productivity is the difference between actual student achievement and the average achievement of a comparable group of students (where comparability is defined by a set of characteristics such a prior achievement, poverty and ELL status).

  4. VARC Philosophy • Development and implementation of a value-added system should be structured as a continuous improvement process that allows for full participation of stakeholders • Model Co-Build; Complete customization • Analysis • Reporting • Value–added is one tool in a toolbox with multiple indicators

  5. VARC Value-Added Partners • Design of Wisconsin State Value-Added System (1989) • Minneapolis (1992) • Milwaukee (1996) • Madison (2008) • Wisconsin Value-Added System (2009) • Milwaukee Area Public and Private Schools (2009) • Racine (2009) • Chicago (2006) • Department of Education: Teacher Incentive Fund (TIF) (2006 and 2010) • New York City (2009) • Minnesota, North Dakota & South Dakota: Teacher Education Institutions and Districts (2009) • Illinois (2010) • Hillsborough County , FL (2010) • Broward County, FL (2010) • Atlanta (2010) • Los Angeles (2010) • Tulsa (2010)

  6. Districts and States working with VARC Minneapolis Milwaukee Madison Racine Chicago New York City Los Angeles Tulsa Atlanta Hillsborough County Broward County

  7. Measuring knowledge • Many factors influence what a student learns and how their knowledge is measured • A variety of measures, including (but not limited to) assessments, tell us what a student knows at a point in time. • What are some ways we measure knowledge?

  8. Measuring knowledge End-of-course Exam Diagnostic Test MAP WKCE Daily Journal Unit Project After-school Activities Hands-on Project

  9. The Simple Logic of Value-Added Analysis • School Value-Added Report • School specific data • Grade level value-added • Comparison Value-Added Reports • Compare a school to other schools in the district, CESA, or state • Also allows for grade level comparisons • Tabular Data available for School Report and Comparison Reports

  10. Attainment and Value-Added

  11. How complex should a value-added model be? • Rule: "Simpler is better, unless it is wrong.“ • Implies need for “quality of indicator/ quality of model” diagnostics.

  12. Model Features • Demographics • Posttest on pretest link • Measurement error • Student mobility: dose model • Classroom vs. teacher: unit vs. agent • Differential effects • Selection bias mitigation: longitudinal data • Test property analysis

  13. Visit the VARC Website http://varc.wceruw.org/ for more information about VARC and value-added

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