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Fuller, Edward J.; Hollingworth, Liz – Journal of Research on Leadership Education, 2016
Recent calls to hold preparation programs accountable for outcomes have led states to develop and adopt preparation program accountability systems. A primary feature of these systems is a focus on outcomes such as placement rates, retention rates, and graduates' effectiveness in improving K-12 student achievement. Yet, little research has examined…
Descriptors: Principals, Administrator Education, Job Placement, Program Evaluation
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Tipton, Elizabeth – Journal of Educational and Behavioral Statistics, 2013
As a result of the use of random assignment to treatment, randomized experiments typically have high internal validity. However, units are very rarely randomly selected from a well-defined population of interest into an experiment; this results in low external validity. Under nonrandom sampling, this means that the estimate of the sample average…
Descriptors: Generalization, Experiments, Classification, Computation
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Wilkins, Chuck; Rolfhus, Eric; Hartman, Jenifer; Brasiel, Sarah; Brite, Jessica; Howland, Noelle – Regional Educational Laboratory Southwest (NJ1), 2012
Many students graduate from high school unprepared for the rigorous reading required in entry-level college and career work. This brief builds on a recent report (Wilkins et al. 2010) that used the Lexile measure (a method for measuring the reading difficulty of prose text and the reading capability of individuals) to estimate the proportion of…
Descriptors: High School Students, Grade 11, Public Education, College English