child learning

Marilyn Hauer

Owner and Director

Marilyn HauerMarilyn Hauer is the Founder, Owner and Director of The Greentrees Country Day School and Camp.  Marilyn has her Masters of Science in Special Education, a Bachelor of Science in Early Childhood Education and Elementary Education. She also holds an advanced degree in Administration.  For over three decades, she has worked as a teacher, director and school district administrator. Marilyn wanted to open a school “where children would always be happy”. Marilyn’s experience has provided Greentrees with the educational foundation that will ensure a meaningful and successful pre-school experience for your child.  As our Director of Education, she sets the tone and standard of education and puts a strong emphasis on creativity as one of the building blocks of learning.  Marilyn is always available to meet with parents and staff to advise them with regard to any questions or concerns.  She encourages and provides opportunities for team building and staff collaboration. Marilyn is the editor and creator of our monthly newsletter The Greentrees Grapevine. This newsletter informs the parents of highlights in the classroom and special events. Marilyn’s joy is to work with children and maintain long lasting relationship with their families.

Linda Hauer

Administrative Director

Linda HauerLinda Hauer, Marilyn's daughter, has worked side by side with her since 1989. Linda is the family's third generation to be involved in education. She is the School's Administrative Director handling the day to day business operation and all tasks required to ensure a successful and enjoyable experience for current families and future families. Linda is involved in many school and camp associations and is co president of UPS (Unified Private Schools). She wholeheartedly believes in the spirit of Greentrees.

Jacquie Sanchez

Educational Coordinator

Jacquie SanchezAs our Educational Coordinator for over 15 years, Jacqueline Sanchez has been a lead teacher and program director.  She holds a BS from C.W. Post College in Early Childhood Education as well as a Masters of Science in Education from Queens College. She is certified in Nursery, Kindergarten and grades 1-6. Along with Marilyn, Jacquie reviews the curriculum semi-annually to ensure that the programs and materials are up-to-date (in accordance with the New York State standards) and effective. She meets with the staff on a weekly basis and also conducts workshops and training seminars keeping the staff current and well informed.  For the past six summers Jacquie has successfully led The Greentrees summer day camp. We are fortunate to have such a dedicated, caring, and energetic leader at Greentrees.  Her professionalism, team spirit, and enthusiasm both at school and camp are tremendous assets.

Greentrees Staff

Staff-PhotoWe pride ourselves in hiring and retaining a well educated and experienced staff.  Our lead teachers have degrees in Early Childhood Education or a related field.  Many hold a Masters Degree as well. Teachers along with our trained classroom assistant teachers are able to communicate, both verbally and non verbally, understanding the pre school age children’s needs. Our staff are empathetic to children's emotions and are also always mindful of parent's needs. We take pride in implementing new and innovative ways to engage children in learning. 

Our Mission

The Greentrees Country Day School strives to help each child grow and develop to his/her maximum potential. We believe that children should grow through a variety of experiences, with challenging activities that encourage each child’s growth physically, socially, emotionally and intellectually. Read More

Trust Greentrees

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Contact Greentrees

247 Jackson Avenue
Syosset, New York 11791
Tel: (516) 921-4949
Fax: (516) 921-3101


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