About Us
Sudbury's After School Community Since 1984.
Where children play, explore, and grow in a safe, nurturing environment.
Who We Are
Our Mission
Sudbury Extended Day (SED) serves the Sudbury community as an independent, not-for-profit family service offering quality before and after-school childcare for grades K-8, including Early Release Wednesday coverage and select school holiday and vacation week programs. Our program follows the Sudbury Public Schools calendar.
We believe children learn best through play. Our programs encourage curiosity, creativity, and connection—helping every child grow socially, emotionally, and intellectually in a supportive environment that celebrates their individuality.
The Mission of Sudbury Extended Day is to provide the children of Sudbury's working parents with nurturing before and after school programs that offer diverse opportunities for enrichment, exploration, and the development of social skills.
The SED DifferenceWhat makes our programs special
Community Connection
Established by parents, for parents in 1984, SED has grown to serve over 600 children across seven locations. We're more than a program—we're Sudbury's trusted neighborhood for after-school care.
Individual Growth
We value each child's uniqueness and encourage exploration at their own pace. Our play-based approach balances structure with the creative freedom kids need to discover their interests.
Safe Haven
Professional staff create supportive, nurturing environments with an emphasis on outdoor play and wellness. Parents trust us to provide a safe space where every child is seen and cared for.
Enrichment Focus
From arts and crafts to nature studies, sports to reading, our diverse activities prioritize social and emotional development alongside academic enrichment. Learning happens through play.
Our History
Sudbury Extended Day was established in 1984 by parents needing extended care for their elementary school children after the regular school day ended. What began as a small program has grown significantly over four decades.
Today, SED continues to serve the Sudbury community as a private, non-profit before and after-school program for grades K-8, operating across seven locations including all four elementary schools, Curtis Middle School, First Parish Church and St. Elizabeth’s Church.
Our Administrative Team
Mari Weldon
Executive Director
978-443-5829 ext. 4
mari@sudburyextendedday.org
A graduate of Emerson College, Mari spent her early career in the advertising industry, working for agencies throughout Boston before opening her own consulting practice in 2007. After ten rewarding years, Mari made the decision to close the practice to focus on family and explore other interests. In the fall of 2017, Mari joined SED as a part-time bookkeeper, which evolved into a full-time role as the Business Manager. She stepped into the Executive Director role at the recommendation of the Board of Directors in February 2022. When not at SED, Mari enjoys time with her family and friends, attending track meets, dance performances, baking, and spending time on the shores of Rhode Island.
Kristen McMillen
Program Director
978-443-5829 ext. 2
kristen@sudburyextendedday.org
Kristen joined SED as Program Director in 2024. She has 12 years of childcare experience, having worked in after-school, camp and youth programs. Most recently, she was the Camp and Youth Program Director of the Hockomock YMCA before deciding to join our team. Kristen has a degree in Biology from Curry College and currently lives in Framingham. When she is not working, Kristen enjoys spending time with family and traveling to new destinations.
Christina Deignan
Business Manager
978-443-5829 ext. 3
christina@sudburyextendedday.org
Christina joined the SED team as a part-time office administrator in the fall of 2021. As she quickly learned more about the organization, she took on additional responsibilities and became the full-time Business Manager in 2022. A graduate of UMASS Amherst, Christina spent her early career at Fidelity Investments, working in Operations, Project Management, and Product Development before taking time off to raise her three daughters in Sudbury. Christina volunteers with meals on wheels in her free time and enjoys spending time with family and friends, golfing, and traveling.
Ellen Cook
Office Administrator
978-443-5829 ext. 1
Ellen joined the SED team as Office Administrator in April, 2024. She is responsible for generating monthly statements, processing schedule change requests, answering prospective and current family questions and preparing contracts, among other things. A graduate of Boston College, Ellen spent the first 15 years of her career in the financial services industry before taking time off to raise her three children in Sudbury. In her free time, Ellen enjoys spending time with friends and family, cooking, golfing and traveling.