General outcome measurement, a specific type of formative evaluation, can be used to assess progress toward long-term academic goals. Curriculum-based measurement is a widely used type of general outcome measurement. When used to develop local norms, curriculum-based measurement data are helpful in making individual student and systems-level…

Data from instruments which are technically adequate and which inform instruction are not only considered best practice, but are legally mandated by laws such as the Individuals with Disabilities Education Improvement Act and No Child Left Behind. The Phonics Diagnostic Inventory (PDI) was designed to assess students' proficiency with specific…

Rates of agreement among alternative definitions of reading disability and their 1- and 2-year stabilities were examined using a new measure of agreement, the affected-status agreement statistic. Participants were 288,114 first through third grade students. Reading measures were "Dynamic Indicators of Basic Early Literacy Skills" Oral…