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W.S. Mount Elementary School

Address: 50 Dean Lane, Stony Brook NY 11790
Main Office: (631) 730-4300
Fax: (631) 730-4313
Principal: Merrilleen Heidrich
Assistant Principal: Lauren Drinkwater
School Hours: 9:25a.m.-3:40p.m.

Exterior photo of WS Mount school building


Welcome Letters

2023-2024 Welcome Letters



2023-2024 Supply Lists


Important Phone Numbers


School Updates 2023-2024

Principal's Welcome Back Letter

New Student Walk Through

Family Educational Rights & Privacy Act

Current News

Erosion Lab at Mount

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Second graders at W.S. Mount Elementary School made hypotheses and investigated the causes of canyons during a hands-on science lab. Students created model landforms using cornmeal. They dripped water over this land to observe how water can change its shape and to understand how, over long periods of time, canyons can be formed through a similar process.

Date Added: 2/23/2024

Stepping on Stage for ‘Frozen’

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W.S. Mount Elementary School fifth and sixth graders stepped on stage to perform the familiar story of “Frozen.” The audience was taken to the land of Arendelle where they followed the journey of Elsa and Anna, while meeting friends like Olaf along the way. Students performed many of the songs from the animated film. Their skills impressed the audience over the course of several live performances. Bravo!

Click here to view the photo slideshow.

Date Added: 2/21/2024

Pre-K Valentine’s Day at Mount

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Pre-K students at W.S. Mount Elementary School celebrated Valentine’s Day by inviting their loved ones to a celebration. Students performed short songs, decorated cookies and exchanged Valentine’s Day cards with one another to celebrate.


Click here to view the photo slideshow.

Date Added: 2/16/2024

100th Day of School

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Students across the district celebrated a milestone on Feb. 14… the 100th Day of School! They were excited to mark their progress from September, while looking forward to the many events and activities taking place in the second half of the year.

Photographed here are W.S. Mount Elementary School students who made 100 Day of School crowns and projects with 100 of the same item on them.

Date Added: 2/15/2024

P.S. I Love You Day in Three Village

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Students and staff turned the Three Village Central School District purple on Feb. 9 to celebrate P.S. I Love You Day. The annual event encourages communities to foster an environment where everyone feels welcome, loved and supported. It also seeks to end the stigma surrounding mental health. This year’s theme was “Love is Meant to be Given.”

Buildings across the district were decorated and students wore purple as a visual display of support for P.S. I Love You Day. This year, P.J. Gelinas Junior High School and Murphy Junior High School coordinated their efforts to celebrate. Art teachers Ms. Cappiello and Ms. Maritato at Gelinas worked with their students to create a backdrop inspired by the P.S. I Love You Day theme. Students were excited to take photos in front of it.

Several elementary schools held spirit weeks to kick off the festivities and students participated in kindness activities throughout the week. At W.S. Mount Elementary School, the student government wrote kind messages on a valentine to be displayed in the building. Staff greeted students on P.S. I Love You Day with more positive messages on the sidewalks outside. Students were encouraged to spread the messaging of P.S. I Love You Day throughout the entire year.

Click here to view the photo slideshow.

View a video recap of the celebrations at Gelinas and Murphy Junior High Schools here.

Date Added: 2/13/2024

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