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Committed to Education

On September 17, 2012, Castle Island opened with just six children.

Years later, we are now well-established school where children thrive in their own independence, confidence,

depth of knowledge and skill, and kind empathy for their diverse peers whose individual strengths

are highlighted in their classroom community.


Castle Island Bilingual Montessori was founded with one purpose -

to build a space for all students to grow, learn and create with each passing day. Through a unique teaching approach and a truly passionate staff, we help students develop academically and personally to the highest level.

We invite you to explore our site and discover the academics and community Castle Island Bilingual Montessori

provides to each and every student. Get in touch with us today to schedule a tour and

learn more about enrollment and what a Castle Island graduate can do!



School Founder & Director

Diane M Nickerson

Passionate about creating a school environment with the highest quality of education, Diane embarked to found Castle Island in 2012. With more than 25 years of experience as an educator, she has achieved NYS certificates as a teacher of elementary education, English as a Second Language, and Spanish, and as a K-12 administrator.  In career has included work a bilingual teacher trainer and as a Montessori school administrator. Trained in Montessori school management at the Center for Montessori Education of New York, she holds an Administrator Credential from the American Montessori Society. Her degrees include a BA in Anthropology from Hobart and William Smith Colleges, and a MS in Educational Administration and Policy Studies from SUNY at Albany.

While raising her four sons to be bilingual, she had been seeking a school for them that would not only meet their language goals, but also provide creative opportunities for their inquisitive minds and active bodies. After some research and travel, Diane found an ideal approach in the Montessori method that holistically meets the learning needs of each child. Wanting to create a school that merges optimal learning environments for both bilingual language immersion and Montessori, she founded Castle Island for our Capital Region community.

She is proud that Castle Island, with its mission towards social justice, creates an intentional space for learning where each child is honored. When not working on developing the programs and growth of the school, she cooks dinner for her family, practices competitive Irish step dance, enjoys the Adirondacks for hiking and skiing, listens to her sons tell stories, and daydreams.


Board of Trustees

President     Edward (Ed) A Nickerson,

Vice-President     Sean Nolan

Treasurer     Vassiliki (Vasso) Potter

Secretary     Jennifer (Jen) Kareklas

Ex-officio Member     Diane M Nickerson

Member     Marcela Gaudín

Member     Yvette Malave Diaz

Member     Dr Keara Sease


Nonprofit Organization 

IRS 501(c)(3) Tax Exempt

EIN 45-4816781

New York State Education Department

Independent (Private) School

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American Montessori Society

Full Member School

Accreditation Candidate 2022

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New York Capital Region Hispanic Chamber of Commerce


New York State Montessori Alliance

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National Association of Independent Schools

Montessori Early Childhood