Charlestown, Boston Tier 4

Charter schools are public and tuition-free. Admission is by lottery, not address — a seat is never guaranteed. Because they are public, the state publishes their results: MCAS percentile, accountability status and per-pupil spending come from DESE. Several charters here are alternative or recovery high schools that enrol students already off-track, so their MCAS and graduation figures are not comparable with a traditional school’s.

Schools within 12 miles of Charlestown, from the MA DESE 2025–26 non-public enrollment report plus the Niche ranking of Massachusetts private high schools. Tuition shown as an estimated range by school type, grades and region — not school-published pricing. A parochial school and an independent day school are priced very differently, so treat these as a starting point and confirm with the school. Niche ranks private high schools only, so an elementary school never carries a number; where one shows a letter instead, that is Niche’s own overall grade, which reaches schools no ranked list does. Neither is a state measure — private schools sit no MCAS and report no results to Massachusetts. That Niche extract is also partial, so a school showing neither was not judged and found wanting; it may simply not have been in it. Student numbers are the figure schools do report, from the same DESE return. Where a student-teacher ratio is shown it is students over full-time-equivalent teachers in the federal Private School Universe Survey, 2021–22, the most recent published — a rough guide to class size, not a class size, and not a ranking either. It is shown only where that survey and the state agree on how many pupils the school has, which is why many schools here have none. Accreditation comes from the AISNE member directory, which records whether a school holds AISNE or NEASC accreditation — the two split the work by age rather than compete, AISNE taking the elementary and middle schools and NEASC the secondary ones. It means an outside body has reviewed the school against published standards on a ten-year cycle. It is not a measure of results, and its absence is not a mark against a school: plenty are not members at all. That directory is also where the schools marked files no enrolment with the state come from. They are real schools that simply make no return to Massachusetts, so the state holds no size for them and this page can show none — and for those, the grade range is read off AISNE’s age bands rather than taken from the school, so treat it as approximate and confirm with the school.