The National Center for Education Statistics (NCES) regularly releases data summarizing selected school performance measures. The four-year adjusted cohort graduation rate is calculated by dividing the number of regular high school diplomas earned within four-years (“on-time”) by an “adjusted cohort.” The adjusted cohort begins with all individuals who entered 9th grade four years previously. It then adds to this group all individuals who transferred in between Grade 9 and graduation and subtracts students who transferred…

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