50 Dean Lane, Stony Brook NY 11790
Phone: (631) 730-4300 | Fax: (631) 730-4309
IMPORTANT PHONE NUMBERS:
Attendance/Health Office: 730-4310
Transportation Office: 730-5070, Fax: 730-5095
Weather Related Closing Information: 730-4050
Kathryn White, Principal
Brian McCarthy, Assistant to the Principal
School Hours: 9:25 a.m.-3:40 p.m.
School Drop-Off/Pick-Up Procedure
Building Security Information |
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A Note to School - Please click on the link provided to print a template for dismissal notes to be sent to the school.
Parent Portal Information - Kindergarten
Parent Portal Information - Grades 1-6
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.