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Prior research on the Measures of Academic Progress (MAP), a computer-adaptive test distributed by the Northwest Evaluation Association, has primarily focused on the Reading MAP for screening/benchmarking in elementary grades. The purpose of this study was to explore the functional form of growth and the extent to which student variability in growth was captured by the Mathematics MAP across a single school year using linear mixed-effects regression. Participants were 1608 middle school students from a school district in the Upper Midwest. Results supported a statistically significant nonlinear growth term for sixth grade and statistically significant, but small, monthly linear growth terms for sixth, seventh, and eighth grades. The Math MAP moderately captured individual variability across grades. Implications for research and practice are discussed.

Educators are required to use evidence-based practices to support student development of academic skills. Results from single-case experimental designs are well suited for this purpose and may be more flexible for applied use than group-based designs. However, educators also require information about which interventions work for whom and under what conditions. Although previous reviews of single-case experimental designs exist, most focused on design characteristics related to internal validity. The purpose of this U.S. study was to determine the participant characteristics within multiple-baseline and multiple-probe across participant designs targeting academic skills. Representation of various demographic subgroups differ between studies targeting different academic skill areas (mathematics, reading, and writing). However, reporting was often inconsistent, with a substantial proportion of records omitting information about participants' race/ethnicity, economic status, and English learner status. This finding was divergent from best practice recommendations. Implications for future research are discussed within the context of the study's limitations. [ABSTRACT FROM AUTHOR]