The Conover Solution is a nonparametric method used to analyze relative growth in students' achievement on state tests administered on two or more occasions. However, there has been very little research assessing the robustness of this method in the presence of missing data. Using vertically scaled and non-vertically scaled data from the math…

Questions and concerns exist regarding the exclusion of students with disabilities from statewide assessments, partly because the number of student with disabilities who are included in state assessment varies from state to state and is generally low. This contributes to a belief that accountability for all students may be misunderstood or ill…