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The four-year cohort graduation rate follows students from the fall of their 9th grade year to the end of their fourth year in high school in order to determine the percent of students graduating with a regular diploma within four years.

The set of students who enter 9th grade -- the cohort -- is adjusted for students who transferred into the New York State public school system, transferred out to public or home school, left the state or country, or deceased.

The cohort graduation rate is calculated by taking the number of students in the adjusted cohort who graduated with a regular diploma within four years and dividing that by the total number of students in the cohort.


High school graduation is the culmination of a successful K-12 education and the gateway to college or employment. Students who do not graduate face the prospect of unemployment or low-paying jobs.



Data for earlier years were not comparable because cohorts were not tracked in the same way. These figures reflect graduates  through August, which includes students who made up courses during summer and graduated. 




  • Statewide, 80.2 percent of the students who started 9th grade in 2013 graduated after four years by June 2017. The rate for New York City average was 71.2 percent, while that of the rest of the state was 85.4 percent.
  • Cohort graduation rates have shown a continual, gradual improvement in NYC and the Rest of State.

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