Charter school terms explained

CharterThe contract the school runs under.

A written performance contract between the school and its authorizer, usually three to five years long. It sets out the mission, the students to be served, the programme, the governance and the measures the school will be judged on. “Charter school” simply means a school that operates under one.

AuthorizerWho grants and polices the charter.

The body that approves a charter, monitors the school and decides at the end of the term whether to renew it. Depending on the state this can be a school district, a state board, a university, a mayor’s office or a dedicated commission. The authorizer is the single most useful thing to look up about a school you are considering.

RenewalThe moment the contract is re-decided.

The review at the end of a charter term. The authorizer can renew, renew with conditions, shorten the term or close the school. Ask any school when its current term ends: a school in its renewal year is in a different position from one that renewed last spring.

Revocation and closureThe charter ends early.

An authorizer can pull a charter mid-term for academic failure, financial mismanagement or governance breaches. Closure means students return to district schools or apply elsewhere, usually with district support.

CMO / EMOThe organisation that may run the school.

A charter management organisation is a non-profit that operates several schools under one brand and back office; an education management organisation is the for-profit equivalent. The school’s board still holds the charter — the CMO or EMO is contracted to run it. Ask who employs the principal.

Open enrolmentNo catchment area.

Any eligible student in the permitted area may apply. It does not mean everyone gets in, and it does not mean enrolment is open all year: applications still close on a date and oversubscription still triggers a lottery.

Weighted lotterySome applicants get extra chances.

A lottery that gives additional weight to a defined group — commonly low-income students or English learners — where state law permits it. Distinct from a preference, which moves a group ahead of the draw entirely. Both are published in the school’s admissions policy.

BackfillWhether empty seats are refilled.

When a student leaves in, say, grade 6, does the school admit a replacement from the waitlist? Schools that backfill keep classes full; schools that do not shrink their cohorts year on year. It is a real difference in culture and in your child’s odds of joining later.

CapA legal limit on the number of schools.

Several states limit how many charter schools may operate, or how many can be authorized each year. Caps explain much of why charter counts differ so sharply between states — see the state-by-state table.

Conversion schoolA district school that became a charter.

An existing public school converted to charter status, usually keeping its building and much of its community. The opposite is a start-up charter, founded from nothing.

Charter networkSeveral schools, one operator.

A group of campuses run by the same organisation, often with a shared curriculum, calendar and admissions process. In the federal data each campus is counted separately, which is why a network with a dozen sites appears a dozen times in the totals.

Per-pupil fundingPublic money that follows the student.

The amount a school receives per enrolled student. Charter schools generally receive per-pupil funding but not the facilities and capital budgets that districts get, which is why rent often comes out of the same money that pays teachers.

Student-teacher ratioNot class size.

Total students divided by total teachers on the payroll, including specialists and coaches who rarely take a full class. Useful for comparing schools with each other; useless as a guess at how many children sit in a room.

Title IFederal money for high-poverty schools.

A federal programme supporting schools with high proportions of low-income students. Charter schools qualify on the same basis as district schools.

CEPFree meals for everyone in the school.

The Community Eligibility Provision lets schools in high-poverty areas serve free breakfast and lunch to every student with no individual application. Many charter schools use it; each school profile here shows the meal programme reported.

The three terms that change a decision

If you read nothing else: authorizer tells you who is holding the school to account, renewal tells you how secure the school’s future is, and backfill tells you whether your child can realistically join after the entry grade. Every school knows its answers to all three.

Find schools to compare

Frequently asked questions