Developing and Validating a Scalable, Classroom-focused Measure of Usable Knowledge for Teaching Mathematics: The Classroom Video Analysis Instrument

This project focuses on developing a scalable, classroom-focused measure of usable mathematics teaching knowledge in three content areas: (a) fractions (grades 4 and 5), (b) ratio and proportions (grades 6 and 7); and (c) variables, expressions, and equations (grades 6 and 7). The project examines a variety of validity evidence for the new items and the reliability of scores to evaluate the overall construct validity.