In this technical report, we describe the results of a study of mathematics items written to align with the Common Core State Standards (CCSS) in grades 6-8. In each grade, CCSS items were organized into forms, and the reliability of these forms was evaluated along with an experimental form including items aligned with the National Council of…

Within a response to intervention framework, teachers regularly base important instructional decisions on the results of formative assessments. The validity of these decisions depends, in part, upon the validity of the inference of students' skills drawn from the formative assessment. If formative assessment items do not genuinely measure the…

The purpose of this study was to develop general outcome measures (GOM) in mathematics so that teachers could focus their instruction on needed prerequisite skills. We describe in detail, the manner in which content-related evidence was established and then present a number of statistical analyses conducted to evaluate the technical adequacy of…