Necessary Conditional Growth Percentiles: A Way to Connect Conditional Growth Percentiles to Achievement

• In Event: Evaluating Accountability Systems and Local Accountability Initiatives

Abstract

Measures for reporting student growth often suffer from two issues. Either they have no direct connection to achievement benchmarks and/or they are nothing more than achievement repackaged as growth. For accountability bodies, school level measures of adequate growth need several important features. First, they must describe growth that is ‘adequate’ for bringing students who have fallen behind up-to-standard. Second, they must be easy to understand and communicate. We derive a method from Thum (2011) for calculating Necessary Conditional Growth Percentiles (NCGP) and empirically test whether reaching a reasonable portion of necessary growth can, over time, predict benchmark achievement.

Authors

• Davie Store, Central Michigan University

• William Sullivan, Michigan State University

• Joseph A Marr, Central Michigan University

• Eric Gunnar Cronstrom, Central Michigan University