Encouraged by family, friends and colleagues, and inspired by her own four sons as well as the hundreds of children from around the world she had taught for over 20 years in the US and abroad, founder Diane M. Nickerson started the school by gathering together supporters of the Castle Island mission: to provide an accessible and world-class education bringing together a strong multicultural community of innovative thinkers and doers who care deeply for the well-being and development of children.


On September 17, 2012, Castle Island opened with just six children. Five years later, our school is now well-established 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 remains a unique school option for families in the Capital Region of New York State.

Hold fast to dreams,
For if dreams die
Life is a broken-winged bird,
That cannot fly.


Langston Hughes

© 2020 Castle Island Bilingual Montessori

Castle Island Bilingual Montessori is an independent school and does not discriminate in our enrollment policies on the basis of race, color, gender, religion, sexual orientation, nation or ethnic origin.