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INTERNATIONAL SCHOOL OF BROOKLYN
BROOKLYN, NY · EIN 134303389 · Form 990 · FY2024 · NTEE B990 · Education · Large ($10M-$50M) · isbrooklyn.org
revenue
$18.2M
expenses
$18.1M
net assets
$1.7M
employees
146
volunteers
50
program ratio
78%
mission · from form 990

WE DEVELOP ADVENTURERS. (SEE SCHEDULE O)

profile · synthesized from sources

International School of Brooklyn is an independent, IB-affiliated school offering bilingual French and Spanish immersion for students from Pre-K 3 through 8th grade. Rooted in an inquiry-based approach, the school fosters global citizenship, critical thinking, and cultural fluency. Located in Carroll Gardens, Brooklyn, it serves a diverse student body and emphasizes equity through a robust tuition assistance program.

irs program accomplishments · form 990 part iii · fy2024

What they reported doing

  1. #1 primary $4.28M
    MIDDLE SCHOOL: A FULL-DAY PROGRAM AIMED FOR STUDENTS TO GAIN MORE INDEPENDENCE AND TO TAKE ON A LARGER ROLE IN THEIR OWN LEARNING PROCESS. THEY ARE ABLE TO ACTIVELY IMPLEMENT THE LEARNING ATTITUDES THAT ARE AT THE CORE OF THE ISB EDUCATIONAL FOUNDATION-INDEPENDENCE, ADAPTABILITY, CREATIVITY, RESOURCEFULNESS, AND COOPERATION-ALONG WITH ACADEMIC SKILLS.
  2. #2 $1.68M
    PRE-SCHOOL: A FULL-DAY PROGRAM AIMED TO BRING OUT THE BEST IN EACH CHILD WITH A LEARNING EXPERIENCE AND OFFERS A DIVERSE PLAY AND LEARNING EXPERIENCE DESIGNED TO NURTURE THE DEVELOPMENT OF THE WHOLE CHILD. EMOTIONAL, SOCIAL, ACADEMIC, PHYSICAL, LINGUISTIC AND CULTURAL DEVELOPMENT ARE INTERRELATED AND OF EQUAL VALUE AND IMPORTANCE.
named programs · 4 · from sources

What they call their work

After School Care & Enrichment
Extended-day program offering enrichment classes and supervised care until 6:00 PM for students in Pre-K 3 through 5th Grade
Lower School Program (Kindergarten to 5th Grade)
Language immersion program in French and Spanish using the International Baccalaureate Primary Years Programme framework to develop literacy, numeracy, and global citizenship
Middle School Program (6th to 8th Grade)
Interdisciplinary, inquiry-based program that fosters independence and critical thinking through the International Baccalaureate Middle Years Programme framework
Preschool Program (Pre-K 3 and Pre-K 4)
Full-day bilingual program nurturing the whole child through play-based, inquiry-driven learning focused on emotional, social, academic, linguistic, and cultural development
activities · 8 groups

What they do

  • Comprehensive K–8 Academic Curriculum 1 activity
    • Deliver multilingual International Baccalaureate education
      Provides French and Spanish language immersion education within the International Baccalaureate framework for students in Pre-K 3 through 8th grade, integrating New York State standards with international curricula through an inquiry-based, globally contextualized approach. The school is accredited by the Spanish Ministry of Education for its full program and by the French Ministry of Education for Preschool and Lower School.
  • ESL and Multilingual Language Support Programs 1 activity
    • Employ diverse, native-language teaching staff
      Employs passionate and experienced educators, all of whom teach in their native language, drawn from diverse cultural and linguistic backgrounds to create a vibrant and immersive classroom environment.
  • Website Accessibility Implementation 1 activity
    • Maintain accessible digital infrastructure
      Designed and maintains the school website in compliance with Level AA of the Web Content Accessibility Guidelines (WCAG) 2.1, with regular monitoring to ensure ongoing accessibility.
  • Early Childhood Education & Development Programs 1 activity
    • Operate preschool and middle school programs fostering holistic development
      Runs a full-day preschool program supporting emotional, social, academic, physical, linguistic, and cultural growth, and a middle school program that promotes student independence and active engagement through core attitudes like adaptability, creativity, and cooperation.
  • College Preparatory Secondary Education 1 activity
    • Prepare students for secondary and higher education
      Prepares students for entry into high schools, colleges, and universities, having graduated its first 8th grade class in 2015 and continued this trajectory since.
  • Multi-Institution Scholarship Funding 1 activity
    • Provide tuition assistance to families
      Awarded over $3.4 million in tuition assistance during the 2025–2026 school year, benefiting 32% of the student body, and granted over $2.9 million in the 2023–2024 school year to increase access to education.
  • Charter School Operations 1 activity
    • Serve a diverse urban student population
      Serves 386 students from 32 different NYC zip codes, with 35% of students identifying as Black, Asian, or Multiracial, following expansion from initial pilot programs in Park Slope, Cobble Hill, and Brooklyn Heights.
  • Alumni Community Building 1 activity
    • Support alumni engagement
      Offers campus reunions, volunteer opportunities, and internships to enable alumni to remain connected with the school community.
financials · form 990 · fy2024
revenue
Total revenue$18.17M
Contributions & grants$382K2%
Program service revenue$17.54M96%
Investment income$180K1%
Other revenue$75K
expenses
Total expenses$18.11M
Program expenses78%
Admin / overhead20%
Fundraising2%
Salaries & benefits$10.77M
Grants paid out$3.16M
Largest expense lineCompensation
balance sheet
Total assets$15.68M
Cash$1.34M
Investments$3.58M
Liabilities$13.93M
Net assets$1.75M
Liquid reserves3.3 mo
6 years on record · 2019–2024 · YoY revenue +6.9%
leadership · form 990 part vii · fy2024

Who runs it

paid leadership · 5
NameTitleHours/wkCompensation
JOSEPH SANTOS HEAD OF SCHOOL 50 $429K
ROSA TORRES LOWER SCHOOL DIRECTOR 50 $174K
ALAN SZE CONTROLLER 50 $172K
KATHERINE ROGERS MIDDLE SCHOOL DIRECTOR 50 $156K
JORDAN GENEE DIRECTOR OF TECHNOLOGY 50 $146K
board members · 13
  • ADDAE COX — BOARD MEMBER
  • ALISON MASCHMEYER — BOARD MEMBER
  • ANTONETTE WHITEHEAD — BOARD MEMBER
  • CHINYERE VANN — BOARD MEMBER
  • GRETCHEN DROBNYK — PRESIDENT
  • JENNIFER DOWNING — BOARD MEMBER
  • JON MCINTOSH — BOARD MEMBER
  • KATE WALKER — BOARD MEMBER
  • MATHILDE QADAR-PATRELLE — BOARD MEMBER
  • MICHAEL LEON RIVERA — VICE PRESIDENT
  • SEBASTIAN GROUARD — SECRETARY
  • TERESA SANTAMARIA — TREASURER
  • YOUSUF AFTAB — BOARD MEMBER
relationships · 10

Who they work with

  • Accessibility Statement Generator Partner — Used the Accessibility Statement Generator tool to create the accessibility statement.
  • French Ministry of Education Government — Accredits the Preschool and Lower School (Pre-K 3 through 5th Grade).
  • ISB Network — Alumni are part of a growing community connected to ISB, including former students, families, and educators.
  • Independent Schools Admissions Association of Greater New York Network — Member of ISAAGNY and adheres to its notification and reply dates for admissions.
  • International Baccalaureate Network — Implements the International Baccalaureate curriculum as part of its academic framework.
  • International Baccalaureate Organization Network — Authorized IB World School offering the Primary Years Programme and Middle Years Programme.
  • International Baccalaureate Organization Network — Member school authorized to implement the IB Middle Years Programme and Diploma Programme.
  • New York City Department of Education Partner — Partners with NYCDOE to offer free bus service within a four-mile radius of the school.
  • New York State Department of Education Government — Granted ISB its operational charter in September 2004.
  • Spanish Ministry of Education Government — Accredits the school's full program.
strategies · 5

How they approach the work

Named approaches extracted from this org’s sources. Where others share an approach, follow it to see the full set of orgs running it.

  • Inquiry-Based to Concept-Based Developmental Pedagogy
    methodology: developmental_pedagogy
    By progressing from inquiry-based learning in early years to concept-based learning in middle school, we align instruction with students’ cognitive development, because this staged approach supports deeper understanding and critical thinking as learners mature.
  • Language Immersion with International Baccalaureate Framework
    methodology: language_immersion_ib_education
    By integrating dual-language immersion in French and Spanish with the International Baccalaureate curriculum, we develop multilingual, critical thinkers with global empathy, because learning through multiple languages and an inquiry-driven, concept-based framework fosters deeper cognitive engagement and cultural understanding.
  • Multilingualism as a Pathway to Cultural Empathy
    methodology: multilingualism_for_cultural_empathy
    By teaching multiple languages through immersive experiences, we cultivate open-mindedness and cross-cultural empathy, because language learning in context enables students to connect authentically with diverse perspectives and global communities.
  • Role Modeling of Lifelong Learning
    methodology: lifelong_learning_role_modeling
    By having faculty and staff model curiosity and continuous learning, we inspire student engagement and inquiry, because visible adult commitment to growth fosters a culture of learning and intellectual risk-taking.
  • Whole-Child Development Approach
    methodology: whole_child_development
    By integrating emotional, social, academic, physical, linguistic, and cultural development equally, we produce well-rounded learners prepared for lifelong success, because education that addresses all dimensions of a child fosters resilience, adaptability, and engagement.