Connecticut Cohort Verification System (CCVS)

Your statewide online portal for verifying, correcting, and finalizing cohort data for Connecticut’s Adjusted Cohort Graduation Rate (ACGR) and federal reporting. CCVS provides districts and schools with a secure, centralized platform to review student-level cohort assignments, correct errors, upload documentation, and finalize records for statewide reporting

About CCVS
The Cohort Verification System helps districts ensure every student is counted in the correct graduation group. It displays each student’s record, allows districts to correct errors, and provides a place to upload documents when corrections are needed. CCVS keeps data accurate so Connecticut can report graduation rates accurately.

Oct 1 Preliminary Cohort Release, Preview only; no corrections allowed. Nov 2 - Dec 15 Correction Window. Nov 2 - Dec 15 Submit corrections, Upload documentation. Nov 2 - Dec 15 State Review Period, CSDE reviews records. Dec 16 Certification Deadline, Superintendent certifies final cohort, All corrections resolved. Dec 17 Final Cohort Lock Date, No further corrections, Cohort becomes final.

Preliminary Cohort Release Date: Districts receive the initial cohort list on October 1 and may begin preview without making corrections
Correction Window is open November 2 till December 15, during which districts submit evidence‑based correction requests.
State Review Period: CSDE evaluates documentation, approves or denies corrections, and communicates decisions any time during the correction window.
District Certification Deadline: Superintendent or authorized designee must certify the final cohort as accurate and complete by December 16.
Final Cohort Lock Date is December 17. No additional corrections can be submitted; cohort becomes final.