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Our Staff


Mrs. Dionne fell in love with the Co-Op when her daughter was a student in 2006. Shortly after in 2007, she joined the Co-Op staff as Assistant to the Director. In December of 2011, Mrs. Dionne became Director. She loves running the Co-Op and cherishes the opportunity to keep the school a constant in the community as a great place to learn and grow.

Mrs. Dionne has a degree in Early Childhood Education and many years of experience in the early education field. She had been a teacher for several years before she had her two children. Mrs. Dionne lives in North Chelmsford with her husband and two children, ages 20 and 17.

What does she love most about the Co-op?
“There are so many things that I love about being a part of the Co-Op. I would say the most rewarding part of my job is being able to witness the miraculous growth of the children over the school year. When they first start school, they are so little and are doing so many things for the first time, which can be so hard and frustrating. Being able to watch and take part in them overcoming these challenges, is beyond rewarding. The amount that these kiddos learn is astounding! Mastering self help skills, potty training, writing their names, zipping their coat, being empathetic, conquering the monkey bars…. the list is endless- I am blessed to be able to be the first step in their educational journey.”

Assistant Director/Lead Teacher

Almost nineteen years ago, Mrs. LeMasurier signed her oldest son up for the two-day program at the Co-op. She has never left and cannot get enough of the Co-op.

She started as a parent and soon held the board position of Repair and Maintenance; she then moved up to Vice President of Fundraising and lastly, she became President.

When a teaching position opened up in 2005, Mrs. LeMasurier resigned as president to pursue her passion of teaching! Mrs. LeMasurier holds an associate’s degree and enjoys continuing her education by taking classes in Early Education. She feels that you can never stop learning.

Mrs. LeMasurier is always on the lookout for a fun and exciting science experiment. She loves seeing her students’ faces light up during the experiments. Instilling a good educational foundation and love of learning is Mrs. LeMasurier ultimate goal.

Mrs. LeMasurier splits her time between the classroom and administration. Booking field trips, and special events, supporting the Board of Directors, teachers and staff are just a few of her responsibilities.

Mrs. LeMasurier lives in Chelmsford with her husband Steve and two of her three boys Eli-19 Joel-17 and her dog Bob a feisty 14-year-old Beagle as well as 4 hens. Mrs. LeMasurier oldest son- Timothy-21 lives in Montana.

What is her favorite thing about the Co-op?

“The wonderful sight of seeing a child figure something out for themselves. The light bulb goes off and it’s all through developmental learning!”

5 – Day Lead Teacher

2 Lynn Piecewicz or Mrs. P. as she is referred to by her students, is returning for her sixth year teaching here at the Coop. Lynn has a Bachelor’s degree in Psychology and minored in Early Childhood Education. Prior to her coming to the Coop Lynn taught for many years at three other schools.

Lynn has lived in N. Chelmsford for about 21 years, an

d is the proud mother of two wonderful young women. Lynn’s older daughter, Jessica is married and just bought a home in Framingham. Her younger daughter Ashley is a graduate from the University of New Haven in CT. She works as a Pre-School teacher in Acton and will be pursuing her Masters in Education.

Assistant Teacher

Mary Kazis’s bio coming soon! 

5 Day Lead Teacher

Mrs. Sheehan started teaching at the Co-op in 2014. However her journey with us began in 2010 as a parent. Since then, all three of her children have graduated from our program and she has remained.

Mrs. Sheehan has her Bachelor degree in Early Childhood Education from Salem State. She has prior experience teaching both preschoolers and toddlers. After a few years of teaching, she stayed home with her own children, until starting at the Co-op.

This year she is very excited to be teaching the 5 day class. She is looking forward to helping the children on their path to success as they get ready for kindergarten. Mrs. Sheehan is always on the lookout for something new and exciting to add to the classroom.

When she’s not at work Mrs. Sheehan’s three children keep her very busy. With all of them playing sport and being involved in activities they are always on the go. She enjoys to camping with her family, shopping and crafting.

Assistant Teacher

Rachael Drab’s Bio Coming Soon 

4 – Day Toddler Teacher

It has been 12 years since Mrs. Holden enrolled her son Hunter in the 3 day program here at the Co-op.  The following 2 years her daughter Maggie also attended our 3 day program during which time she served on the Board as Vice President of Fundraising.  Not long after followed her youngest sons, Beckett and Wyatt, also attending the 3 day program.

She loves the philosophy and atmosphere of our school so much that when a position opened up in August 2015 for Assistant Teacher she jumped at it!  This year Mrs. Holden is a 3 day Teacher and 2 day Asst. Teacher.  She loves nothing more than seeing the curious minds of her students become more confident every day!  There is magic in the light that shines in the eyes of a student when exploring and learning.

Mrs. Holden continues to take courses and is always searching for something new and exciting to share with her students!  There is always more to explore and learn!

Mrs. Holden has lived in Chelmsford her entire life where she resides with her husband Will and four children Hunter, Maggie, Beckett, Wyatt and Coonhound Buford!  Her children attend Center School, McCarthy Middle School and Chelmsford High School.  You may see her on the soccer or baseball fields or on the dance circuit as her kiddos keep her on the run!

Assistant Teacher

Mrs. Krochune started teaching at the Co-op in 2016. She has a bachelors degree in Psychology and minored in Health Education at Elon University in North Carolina.

After working for many years in Boston, she chose to stay home with her 3 children – 2 of which attended The Co-op. She volunteered a great deal in her children’s various classrooms throughout the years and fell in love with The Co-op. When an assistant teaching position opened up, she jumped at the opportunity.

One of her favorite things about The Co-op is all the different learning opportunities the kids have here. From science lessons and hands on agricultural activities to gaining independence in writing and fostering their own creativeness, it is truly amazing to watch.

Mrs. Krochune has lived in Chelmsford for 9 years with her husband John and their 11 year old son Colin, 8 year old daughter Teagan, and 6 year old daughter Bianca.

3 Day Lead Teacher

Mrs. Grout teaches our friends in the Monday, Wednesday, Friday class with Mrs. St. Onge as her assistant. She started working at the Co-op in 2017. Working with children has encompassed most of her entire career since her high school days. She received an Associates degree from Middlesex Community College and went on to Lesley University where she received a B.S. in Human Development and Family Studies and Elementary Education. Being a bit undecided after graduation, she worked in the corporate world, participated in a traveling and teaching program as well as taught preschool.  Kristi has been working in an elementary after school program in Lexington for many years.  Kristi and her husband moved to Chelmsford eight years ago and love all that the community has to offer.  Together they have two daughters, Lily and Leah.  Lily is a fourth grader and Leah attends Kindergarten!  Her step-son, Justin is in his second year of college.

In her free time, she enjoys the outdoors, cooking, listening to music and spending time with family and friends.

What is her favorite thing about the Co-op?

“My favorite thing about the Co-op is the warm and inviting feel you get when you enter.  My favorite event is the Thanksgiving feast when all the classes get together.”

Assistant Teacher

Mrs. St. Onge started working at Central Co-op in 201 as an Assistant Teacher with Mrs. Grout in the Monday, Wednesday, and Friday class.

After spending the last two years at home with her two sons, Fletcher and Miles, Mrs. St. Onge has joined us and is loving her time with the preschool program. Before deciding to stay home with her sons, Mrs. St. Onge worked as a marketing executive for a software development company. Her degree is in English – Professional Writing with her graduate work in Education. She has volunteered in different preschool and elementary school settings since her boys started school. 

Mrs. St. Onge has lived in Chelmsford for the three years with her husband Randy, their 10 year old son Fletcher, and 8 year old son Miles, and their two dogs – Kaskae and Beagle (yes, he is an actual Beagle). She enjoys reading, music, and spending time with her family and friends.