In the third year after the accreditation visit, the school submits to ISACS (by May 1) a 3-Year Progress Report.

Following the instructions and format described in Appendix U.2 in the ISACS Accreditation Guide, 13th ed., the school reports the progress made in implementing the recommendations with which the school agreed in its Reaction Report completed in Year 4. The Progress Report is also reviewed by the Accreditation Review Committee and acted upon by the ISACS board at one of its quarterly meetings.

Any deficiencies in the school's progress report or concern over apparent lack of progress in implementing recommendations are communicated promptly to the school, which is then held accountable for appropriate remediation within a reasonable period of time.

At the time of the progress report (after a school has completed at least its second seven-year cycle), a school may petition to have its accreditation extended for an additional three years, committing to further school improvement tasks as indicated in years 7 - 10.