The standard for charter
school board governance.

Charter schools are public institutions governed by volunteer boards, yet no sector-specific governance maturity framework has existed. Existing board assessment tools rely on self-reported intentions rather than behavioral evidence, and none map cleanly to authorizer accountability expectations.

CGMI fills that gap with a staged maturity model built specifically for charter school governance — evidence-based, authorizer-legible, and continuously appraisable.

Where traditional board assessments produce a single score from a survey, CGMI measures governance across five independent domains, each with defined practice areas and cumulative gate requirements. A school’s maturity level is determined by its lowest domain rating — ensuring balanced capability rather than strength in one area masking weakness in another.

The framework supports three tiers of appraisal — from continuous, data-driven self-assessment through formal certified evaluation — so schools at every stage of maturity have a clear, actionable path forward. Ratings map directly to NACSA principles and CSP rubric sections, making them immediately legible to authorizers without translation.

CGMI is published as an open specification with a machine-readable JSON schema, a structured public comment process for revisions, and a versioned changelog — the governance infrastructure charter schools have needed but never had.