In recent years, a raft of research has called attention to the importance of effective teaching in influencing student achievement. Yet federal and state accountability policies continue to focus primarily at the school level: using schools as the unit of performance, identifying “failing schools,” and more recently targeting “turnaround schools” for special intervention. One of the best-kept secrets in educational research, it seems, is the fact that differences in the quality of instruction from classroom to classroom within schools are greater than differences in instructional quality between schools. This finding has been documented in a variety of studies, most of which used indirect measures to evaluate instruction (such as relying on teachers’ perceptions or looking at curriculum materials to determine how much time they spent on particular topics). Despite the limitations of these measures, these studies have suggested that there is considerable variation in practice even among teachers in the same building.
Over the past five years, however, researchers led by Brian Rowan, the Burke A. Hinsdale Collegiate Professor in Education at the University of Michigan, have asked teachers in 112 schools to keep detailed logs of their actual practice. The newly released results of the Study of Instructional Improvement (SII) document dramatic differences in the kinds of skills and content taught from classroom to classroom. For instance, the study showed that a fifth-grade teacher might teach reading comprehension anywhere from 52 days a year to as many as 140 days a year. Similarly, first-grade teachers spent as little as 15 percent to as much as 80 percent of their time on word analysis. Thus, the study found, students in some classrooms may spend the majority of their classroom time on relatively low-level content and skills, while their peers in the class next door are spending much more time on higher-level content.
Jay Matthews has more.