Achievement First Linden Charter School
- 800 VAN SICLEN AVE, Brooklyn
- Grades K-4
- Mariama Diallo/Stephanie Blieka, Principal
- 347-471-2700
About
Achievement First Linden Charter School serves elementary students in grades K-4 in Brooklyn. The school has an enrollment of 623 students, which is near the citywide 75th percentile. The student body is predominantly Black at 71 percent, with 20 percent Hispanic, 2 percent Asian, and 1 percent White students. The Economic Need Index is 86 percent, which is near the citywide 75th percentile, indicating a high proportion of students facing economic hardship. The percentage of English Language Learners is 5 percent, which is below the citywide 25th percentile. The school describes its mission as preparing every student to excel in college and career, deepen their knowledge of self and community, and lead lives of purpose, working to disrupt the legacy of inequity in education. In academic outcomes for elementary grades, 57 percent of students demonstrated math proficiency, which is above the citywide median. ELA proficiency was 50 percent, which is below the citywide median but above the 25th percentile. The school's accelerated coursework rate is 3 percent, which is below the citywide 25th percentile. Parent and student survey results are not available for this school.
Sources (3)
- NYC DOE Location Code Generating and Management System (LCGMS) · 2026-27 (export of 2026-08-22)
- NYC DOE School Quality Reports and Snapshot, 2024-25 · 2024-25
- NYC School Survey (parent and student responses)
Academics
State test proficiency rates and acceleration.
ELA proficiency
50%
Math proficiency
57%
Proficiency rates are from the Grade 3–8 NYS state test (school-level).
Attendance rate
95%
Avg class size (general ed)
—
Avg class size (ICT)
—
Community & climate
Demographics, attendance, school survey results, and DOE quality ratings.
Quality signals
NYC School Survey, 2025-26
Overall positive % is averaged across every Pos/Neg survey question per respondent group (school year 2025-2026). Survey topics are the DOE’s framework measures (each the average favorable response across its questions; expand a topic to see them and the citywide average); the dimension scores themselves are no longer in the public data file.[3]
Operational health
Attendance
95%
Chronic absenteeism
34%
Suspension rate
3%
Teachers[7]
Teachers with 4+ years' experience
72%
Students per teacher
22:1
Teaching out of certification
74%
Teacher experience and certification from the NYSED School Report Card (2024–25); students per teacher = enrollment ÷ reported teachers. Fewer than 4 years counts as inexperienced.
Student body
Race / ethnicity[4]
- Asian 2%
- Black 71%
- Hispanic 20%
- White 1%
- Multiracial 1%
School-level totals; may not sum to 100% due to rounding and small subgroup suppression.
Gender[4]
- Female 53%
- Male 47%
Female / male shares as published by the DOE; other gender identities aren’t reported in the source data.
Enrollment
623
Economic Need Index
86%
Free / reduced lunch
93%
English learners
5%
Students with IEPs
19%
Financials
[8]What this school has to spend, and what it spends it on. Spending is not a measure of quality. Schools serving more students with higher needs receive more money.
Charter schools manage their own budgets rather than receiving a school allocation from the DOE, so the staffing and supplies breakdown the DOE publishes for district schools is not published for this school.
Spending
Total spend
$14.7MStudents: 630
55th percentile citywide
Total spend per student
$23,344
8th percentile citywide · city median $33,357
Location & commute
Where the school is and how to get there.