This "Brief Report" summarizes results from a study that investigated joint effects of two innovations adopted at a high school in an affluent suburban community in the northeast United States: 4 x 4 block scheduling and the "Standards"-based curriculum, the Interactive Mathematics Program (IMP).

Reviews research on block scheduling as related to the study of mathematics. Suggests issues for mathematics teachers to consider as they decide whether or how to improve such schedules. Discusses mathematics achievement under a block schedule. Contains 40 references. (ASK)

A study of British Columbia high schools found that block scheduling can endanger mathematics achievement. Reduced math scores were attributed to irregular planning time, little opportunity to modify curriculum; and the provincial examination system. Longer time blocks cannot succeed without adequate planning time, curricular restructuring, and…

Although research has confirmed block scheduling's nonacademic benefits, effects on academic achievement are mixed. Teachers do not always replace lecturing with more effective participatory teaching methods. To work best under an intensive or alternating block schedule, schools should adapt the math curriculum to reduce course redundancy and…