Cohort: A cohort is a statistical grouping of students based on the year they enter the ninth grade for the first time together.
How are students in the cohort tracked?
Each individual student's status is tracked over time and throughout the Virginia public school system using his or her unique state-testing identifier maintained through the commonwealth's Education Information Management System. The identifiers allow the state to follow students as they transfer in and/or transfer out of Virginia public schools.
Students who graduate in fewer than four years are counted as on-time graduates and are included in the graduation rate calculated for their original ninth-grade cohort.
The on-time graduation rate includes only those students who graduate from high school within four years of entering ninth grade. It does not include: