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…