50 Dean Lane, Stony Brook NY 11790
Phone: (631) 730-4300  |  Fax: (631) 730-4309

Attendance/Health Office: 730-4310
Transportation Office: 730-5070, Fax: 730-5095
Weather Related Closing Information: 730-4050

Kathryn White, Principal
Merrilleen Heidrich, Assistant Principal

School Hours: 9:25 a.m.-3:40 p.m.

School Drop-Off/Pick-Up Procedure

Building Security Information

Happy St. Patrick's Day, Stony Brook Vets Home!

Mount students strike again, this time sending well wishes to our local vets many different ways!  Ms. Lachler's First Grade Class made leprechauns and a pot of gold (cookies) to let the vets know they are "more precious than gold." 

Ms. Silverman's class made a class book of poems and limericks to share with the vets, while Mr. Rotunno's third graders made some beautiful watercolor paintings!  A representative from the vets home said, "The residents will be so happy!"


Valentines for the Vets

2nd grade students in Ms. Kenny, Ms. Fizzuoglio, and Ms. Pushee's classes made Valentines to be delivered to the Stony Brook Veterans Home!



  Myachi at Mount 


October is Fire Prevention Month


 On October 16th the Stony Brook Fire Department visited Mount Elementary School to teach the children about Fire Safety.  Thank you to all the Stony Brook Fire Department Volunteers for coming and spending time with the students!  The children enjoyed learning about the importance of fire prevention!


Hip Pickles Come to Mount to kick off the 2015 - 2016 School Year! 

Thank you to the Mount PTA for this fun event that taught students about treating others the way they would like to be treated in a fun and interactive way!




Article: Keeping Kids Cool at School 


2015-2016 Supply Lists 

(Now located on side navigation)





William Sidney Mount School is one of five elementary schools located in the Three Village School District in Stony Brook, NY.  Currently, we house grades kindergarten through sixth grade.


US Dept. of Education designates WS Mount as a Blue Ribbon School!!
Click here for more information.  Visit the Dept of Education website.
Click here to watch the video!

Please be sure to check the Calendar and the Parent Notices regularly for important updates throughout the school year.   



Current News

Top Mathematicians

W.S. Mount Elementary School’s Math Club defended their award-winning reputation this May by shining brightly at the ninth annual Suffolk County Math Tournament held at Stony Brook University.

During the event, 66 teams comprised of 330 students in fourth through sixth grade competed. Awards were given to the top three teams, and individual awards were given to the top 10 competitors. As a result of their determination, the Mount Math Masters’ two teams were awarded first and second place in the competition. In addition, Mount students were awarded seven of the 10 available trophies for individual excellence.

The district congratulates the following students and their coach, Linda Earls, on this remarkable achievement: Neal Carpino, Matthew Chen, Ivan Ge, Alexander Lin, Carolyn Lin, Ashwinaa Vaithianathan, Jacqueline Wu, Claire Yang, William Zhang and Ari Zucker.

Recycled Projects

W.S. Mount Elementary School third-graders put their creativity to the test when they invented a variety of projects using recycled materials.  
From paper towel rolls, plastic water bottles, discarded wood and a slew of other materials, the students created such projects as a floatation device, birdhouse, desk organizer and even a Nok Hockey board.

The classes proudly displayed their completed projects in a hallway museum and embarked on a recycled scavenger hunt. During the hunt, the students located projects based on the materials used and described which craft was their favorite and the supplies used to create the piece.

Wild About Nature

W.S. Mount Elementary School kindergarten students learned about a wide variety of animals during a school workshop with Nature Nick.

During the interactive program, the students had the chance to observe and learn about such animals as a kangaroo, snake and a monkey. With a connection to their classroom curriculum, they enhanced their understanding of these animals’ physical characters, habitats and diets.

Growing Awareness

W.S. Mount Elementary School third-grade students in Robert Rotunno’s class turned a simple writing exercise into a creative awareness project for a cause near and dear to at least one classmate’s heart – ALS or Lou Gehrig’s Disease.

The writing project called for the students to explain what they would do with $100 and several noted they would gift it to charity. Patrick Scali, the grandson of ALS advocate and Ride for Life creator Chris Pendergast, educated his peers about ALS and the class moved to turn the creative writing initiative into reality.

Each student contributed to raising $100 for ALS research and helped to plant a tulip garden dedicated to spreading awareness of the cause in the school’s bus circle.

“It feels really good to support and help those in the community affected by this disease,” said Patrick. “I hope when people see the garden they are inspired to learn more and find their own ways to help.”

Making History

W.S. Mount Elementary School sixth-graders Neal Carpino and Matthew Chen have qualified to compete in the National History Bee National Finals being held this June in Chicago.

The students earned a bid to this final level based on their performance at the National History Bee regional competition.

During the final stage of the contest, they will compete for the title of National History Bee Champion as they answer questions about U.S. history and world geography. In addition, Neal and Matthew will have the opportunity to participate in a variety of side events, such as the Great History Hunt, National Citizenship Bee, Pop Culture Challenge, Family Quiz Night and ACE HistoryWorld.

Monday, May 30, 2016   |  District Home