Achievement First North Brooklyn Preparatory Charter School, Brooklyn NY

Original Research by School Decision on Achievement First North Brooklyn Preparatory Charter School

Achievement First North Brooklyn Preparatory Charter School serves kindergarten through eighth grade in the Williamsburg-East Williamsburg area of Brooklyn, with an enrollment spread fairly evenly across its grade band. The school is part of the Achievement First Brooklyn network, a charter operator whose schools were recently renewed through 2029-30, providing stability for families concerned about continuity.

The school's math performance shows a clear arc. Third and fourth graders demonstrate strong proficiency, with most meeting grade-level standards. Performance drops notably in fifth and sixth grade, where proficiency falls to around two-thirds and then to roughly two-fifths by sixth grade. Seventh and eighth grade math proficiency sits in the mid-to-upper range. English language arts follows a somewhat different pattern: third and fourth grade proficiency is near the middle of the distribution, but performance improves steadily through middle school, with eighth graders showing solid attainment. Science testing data is available only for fifth and eighth grade; fifth graders show modest proficiency while eighth graders perform better. A parent looking at these results may want to ask the school directly about the dip in middle grades mathematics and what targeted support is available for students who are struggling at those grade levels.

The school's overall proficiency index places it in the top quartile among charter and traditional schools in Kings County, a distinction that reflects strength in early grades and late middle school while acknowledging the soft spot in the fifth-to-sixth grade span.

The student body is predominantly Hispanic, with substantial Black enrollment and small shares of other racial and ethnic groups. Free-or-reduced-price lunch eligibility data were not reported, and English learner and special education enrollment counts are also unavailable, so a parent seeking that information should contact the school directly. The school does not report attendance or chronic absenteeism data.

Brooklyn's housing market is active and expensive. Home values in the school's zip code are substantially above both state and national medians, with modest year-over-year growth. Rental rates are equally steep. The neighborhood itself is experiencing significant residential development; Downtown Brooklyn and Williamsburg have seen major residential construction in recent years, reflecting the borough's position as a growth engine for New York City. The civic texture blends dense transit access, walkable retail corridors, and green space anchored by major parks and library branches. Employment is concentrated in healthcare, higher education, and a growing tech sector, with several major hospitals and SUNY Downstate as prominent anchors.

The Achievement First network has invested in high-quality instructional materials, expanded intervention services, and strengthened social-emotional supports across its schools in recent years as part of post-pandemic recovery. This represents a curriculum and pedagogical shift that affects how instruction is delivered. The school itself does not appear to have a dedicated website, so information gathering may require direct contact with the school office or the Achievement First network.

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Academic performance

How students perform on state tests, by grade, set against the district.

Math

Grade 395%

School 95% · district not reported

▲ 37 pts above state median · ▲ 25 pts above county median

Grade 492%

School 92% · district not reported

▲ 33 pts above state median · ▲ 25 pts above county median

Grade 568%

School 68% · district not reported

▲ 17 pts above state median · ▲ 11 pts above county median

Grade 640%

School 40% · district not reported

▼ 5 pts below state median · ▼ 10 pts below county median

Grade 767%

School 67% · district not reported

▲ 14 pts above state median · ▲ 9 pts above county median

Grade 857%

School 57% · district not reported

▲ 20 pts above state median · ▲ 17 pts above county median

English language arts

Grade 351%

School 51% · district not reported

▼ 1 pts below state median · ▼ 14 pts below county median

Grade 453%

School 53% · district not reported

even with state median · ▼ 9 pts below county median

Grade 557%

School 57% · district not reported

▲ 3 pts above state median · ▼ 4 pts below county median

Grade 663%

School 63% · district not reported

▲ 17 pts above state median · ▲ 11 pts above county median

Grade 766%

School 66% · district not reported

▲ 19 pts above state median · ▲ 9 pts above county median

Grade 876%

School 76% · district not reported

▲ 28 pts above state median · ▲ 20 pts above county median

Science

Grade 547%

School 47% · district not reported

▲ 5 pts above state median · ▲ 7 pts above county median

Grade 863%

School 63% · district not reported

▲ 30 pts above state median · ▲ 38 pts above county median

This schoolDistrict average, same grade

Graduation rate (ACGR) reflects the federally published Adjusted Cohort Graduation Rate for the most recent year available. We refresh this data annually at the close of each academic year in June. The federal source publishes a banded rate (for example, "90-94%") instead of an exact number for cohorts small enough to risk identifying individual students. The state distribution chart, where shown, plots every school in the state with a published rate or band; schools whose rate is federally suppressed are excluded. Where the federal source publishes a band rather than an exact rate, the school is placed within its band using a stable, ID-derived offset, so its position is consistent across visits.

Proficiency by household income

English language arts

Grade 3Lower-income48%Higher-income70%22 pp gap

Grade 4Lower-income54%Higher-income40%14 pp gap

Grade 5Lower-income55%Higher-income86%31 pp gap

Grade 6Lower-income60%Higher-income89%29 pp gap

Grade 7Lower-income65%Higher-income78%13 pp gap

Grade 8Lower-income74%Higher-income100%27 pp gap

Mathematics

Grade 3Lower-income95%Higher-income100%5 pp gap

Grade 4Lower-income91%Higher-income100%9 pp gap

Grade 5Lower-income68%Higher-income67%2 pp gap

Grade 6Lower-income39%Higher-income56%17 pp gap

Grade 7Lower-income68%Higher-income56%13 pp gap

Grade 8Lower-income57%Higher-income60%3 pp gap