Block schedules have been used in several different high schools in various areas of the United States. Reasons for their use vary from better preparing students for college work to fewer disruptions of the school day. Several studies have examined the impact of changing from a semester system to a block system on the academic performance in…

One schedule innovation--the four-period day and semester-length courses--is revamping North Carolina and Virginia high schools. At Orange County (Virginia) High School, a simplified and flexible 4-year 9-13 semester-block program is helping kids complete more courses, receive better grades, and take and pass more advanced-placement exams. (MLH)