An ex post facto research design controlling for alternative hypotheses is the framework for this exploratory analysis of the relationships among school/non school factors and grade level/content value-added scores in Ohio. Building level, non school, student data such as socio-economic status, ethnicity, mobility, attendance and gender were matched with grade level/content value added scores in Ohio. School level data such as numbers of teachers, teacher experience and training were also matched with grade level/content value-added scores in Ohio. Boxplots revealed a reduction in range of...