Our Staff

Cary Williams

Head of School

Founded Keystone in 1998

Mom to 3 Montessori adults and one who is non-verbal and autistic

Education: EEC Director II licensed, Bachelor's in Early Childhood Education and Developmental Psychology, Bachelor's in Elementary Education, and Visual Arts, Teacher certification for birth - grade 8, AMS Early Childhood Teacher Certification from NEMTEC, Montessori School Management Certification from CMTE-NY, certified instructor for the International Network for Children and Families (INCAF) in Positive Discipline

About Cary: Cary has worked in Montessori education since 1977. She has worked in both public and private traditional elementary schools, special education programs, traditional preschools and daycare centers, and both A.M.I. and A.M.S. Montessori schools. She has been a keynote speaker for The Montessori Schools of MA, and presented parenting classes in Positive Discipline to the general public as well as to the Keystone parent community. Cary saw a need to create a Montessori school with Montessori-trained leadership that could support its educators in the same way that a Montessori teacher supports their students: respect for the individual, development of human potential and support of a caring community. She believes that success in school is directly related to the degree that children believe that they are capable and independent human beings and that inclusion in a learning community that supports diversity and tolerance is critical for children to build a healthy and positive world.

Hobbies: Reading (voraciously!), Travel, Organic gardening, Tending to houseplants, Spending time with her dogs, Exercising, Practicing natural health, Watching movies/streaming mysteries, Neuroscience and the developing brain, History, World politics, Economics, Design, Conflict resolution, Early language acquisition, Mental health, Meditation, Eastern studies, Environment, Ornithology, and All creatures great and small

Why is Keystone special to you?: “It’s miraculous to see my dream materialize and continue to grow. We have a long term staff that form a strong community that feels like home for all of us and an amazing and supportive parent community. Watching our students grow and become confident, joyful, socially aware, and kind adults has validated that our little school is making a big difference in the world, and that’s what matters; Making the world a better place!”

Lisa Ciesluk

Assistant Head of School

Joined Keystone Team: 2012

Keystone Parent Alumna

Education: Bachelor's in Finance

About Lisa: After a career on the financial side of both corporate and small business settings, Lisa was intrigued by Montessori education at the school her children had recently joined. She took on an assistant teacher position there and very quickly felt the pull towards a new career in Montessori. In 2012 she moved to the Keystone area and stepped into her role as Assistant Head of School, overseeing the finances, admissions, family communication & relationship-building, as well as staff management.

Hobbies: Boating on the lake near her home with family

Why is Keystone special to you?: “It feels like home and is such a unique school because everyone is so invested in our mission. We have an amazing parent community that is very supportive and invested in their child's learning.”

Grace Yannakakis

Director of Faculty & Program Development

Joined Keystone Team: 2023

Education: Bachelor's in French & Political Science from Syracuse University, Master's in French Language & Literature from the University of Washington, Master's in Education Leadership from Teachers College Columbia University, Certificate in Nonprofit Management from Case Western Reserve University, AMS Leadership Credential (ongoing)

About Grace: Grace began her career in education teaching French and Latin to middle and high school students in an independent school in New Jersey. After 10 years of teaching, she pivoted towards the administrative side of education. While pursuing her Certificate in Nonprofit Management in Ohio, she chose to partner with Ruffing Montessori School and fell in love with Montessori. From there, Grace has held leadership positions in both traditional and Montessori settings as Head of School, Assistant Head of School, Education Director and now, her current role as Director of Faculty and Program Development here at Keystone.

Hobbies: Spending time with family (3 children, 2 dogs, 2 cats and 1 husband), cooking, traveling, gardening, yoga, meditation, dancing and playing music

Why is Keystone special to you?: "I admire Keystone for its longstanding commitment to Montessori education. Cary Williams is a passionate educator who started a small school more than 20 years ago and has sustained it with the help of a whole community of wonderful educators and families. It is an honor to be welcomed into this special and unique place for learning."

Kaylin Beck

Administrative Assistant

Joined Keystone Team: 2022

Education: Bachelor's in Interactive Media Development

About Kaylin: Kaylin has worked with children in a variety of different roles. She was an art educator and worked in curriculum building for YMCA summer programs, in environmental camps in northern Maine, and volunteered her summers in children's STEM programs. Post college and after a short time working in the video game development industry, Kaylin has returned to working with families and their children in educational settings, joining the Keystone team as of fall 2022.

Hobbies: Reading, playing games with friends, traveling, and going to museums

Why is Keystone special to you?: "As someone brought up in experiential learning in small class settings, and exceled in those environments, I love to see new generations thrive and grow in the same type of learning environment, and has given me, as an adult, a warm welcoming place to continue learning as well."

Erica Adelson

Assistant to Head of School

Joined Keystone Team: 2021

Education: Bachelor's in Arabic & Middle Eastern Studies from Smith College

About Erica: Following her language studies, Erica stepped into the assistant director role of a community language school in Cambridge, MA, combining her love for language teaching with an administrative role. After 7 years in that position, Erica brought her experience to the Keystone team and returned to a Montessori environment.

Hobbies: Watching movies/series in different languages, long walks with ice cream cones

Why is Keystone special to you?: "Keystone is a very human-centered school where you can feel how much all the staff care about creating positive outcomes for children and their fellow colleagues."

Sibel D. Aydogan

Administrative Support

Joined Keystone Team: 2005

Keystone Parent Alumna

Education: Law school, EEC certification, time management coaching certificate

About Sibel: Sibel's legal career has traveled with her between her home country of Turkey, as well as the United States. First as a trademark lawyer in Turkey, and then here as a mediator in the Attorney General's office and in an immigration law firm position, Sibel found a new passion and connection to Keystone after becoming a parent at the school. Inspired to get more involved in the community, Sibel has now shared her talents in both the classroom as a substitute and assistant teacher, in addition to being a pillar of the front desk team.

Why is Keystone special to you?: "Keystone is a fostering environment where diversity and inclusion are valued."

Lisa Eisenberg

Business & Financial Advisor

Joined Keystone Team: 2003

Education: Bachelor's from Harvard University

About Lisa: For over 30 years, Lisa has helped small businesses to survive and thrive. She has been enhancing Keystone's business performance, creating opportunities for growth and personal fulfillment for staff, and strengthening the school's reputation for almost 20 years.

Hobbies: Hiking, bicycling, triathlon competitions

Why is Keystone special to you?: "Cary Williams has a clear and overarching mission to lead a school devoted to operating according to the principles of Maria Montessori, offering a collaborative and enriching workplace for faculty and staff, and a welcoming and diverse family and student community. All of her leadership decisions are measured against these objectives and the success and outstanding reputation of Keystone has been the result."

Jenna Mahoney-Pierce

Infant Lead Teacher, Beginners' Program Director

Magnolia Room

Joined Keystone Team: 2018

Current Keystone Parent

Education: Bachelor's in Natural Sciences with a minor in Education, AMS Montessori Teacher Certification for infant and toddler at Northeast Montessori Institute, EEC certification

About Jenna: Since making her foray into the education field in 2006, Jenna has explored a variety of ages and settings as a teacher before zoning in on her calling: infant Montessori!

Hobbies: Crafting - painting, beading, crocheting, knitting, sewing, dollhouse making...to name a few

Why is Keystone special to you?: "I have always known that I was meant to be a teacher. Since graduating college in 2006, I have been on a search for a perfect fit. It wasn't until I found Keystone that I realized my search was over. Not only is Keystone a perfect fit for myself, as a teacher, but also my child."

Nicole Fletcher

Infant Assistant Teacher

Magnolia Room

Joined Keystone Team: 2022

Current Keystone Parent

Education: Associate's in Early Education, EEC certification

About Nicole: After delving into childcare privately as a nanny and babysitter for more than 5 years, Nicole decided to formalize her entry into the field by pursuing an associate's degree in early education. She came aboard the Keystone team in Fall of 2022 to carry out a 150-hour practicum in assistant teaching as the last stage to complete her degree and became a part of the full-time staff.

Why is Keystone special to you?: "Friendly people, dedicated teachers and just a great atmosphere"

Mileydy Arias

Infant Assistant Teacher

Magnolia Room

Joined Keystone Team: 2023

Current Keystone Parent

Education: High school vocational degree in Early Childhood Education, EEC certification, medical assistant, Bachelor's in Child Psychology (in progress)

About Mileydy: Mileydy has been passionate about working with young children from a young age herself, completing a high school vocational degree in Early Childhood Education and earning EEC certification upon graduation. Before joining Keystone in 2023 as a staff member in the toddler program, and as a substitute, Mileydy spent more than 5 years gaining experience in family childcare settings. In Spring 2024, Mileydy joined the full-time staff of the Magnolia infant classroom.

Hobbies: Spending quality time with my kids, going on vacation, road trips, and being outdoors

Why is Keystone special to you?: "Keystone is special to me because I know it makes a difference. I’ve witnessed children flourish and learn and developed strong independence."

Olivia Howland

Infant Lead Teacher

Baobab Room

Joined Keystone Team: 2023

Education: EEC certification, Bachelor's in Spanish (in progress), Bachelor's in Fine Arts (in progress)

About Olivia: Olivia's interest in art took her to Switzerland for two years before returning stateside and becoming an art teacher’s assistant at a Montessori school in Colorado. Eager to explore more of the Montessori world, Olivia joined the Keystone team in 2023 in the Magnolia classroom. After gaining more classroom experience, completing coursework and mentorship at Keystone, Olivia stepped into the role of lead teacher in the new infant classroom, Baobab, in 2024.

Hobbies: Painting, skateboarding, learning languages

Why is Keystone special to you?: "Working at Keystone is special because it allows me to foster a student-centered environment where children are encouraged to explore, learn at their own pace, and develop independence. The focus on hands-on learning and individualized attention ensures that each child's unique strengths and interests are nurtured, fostering a genuine love for learning that lasts a lifetime. Keystone provides the perfect environment for me to indulge in the Montessori method and share wholesome experiences that teach and enrich both me and the children."

Sailaja Sannapureddy

Infant Assistant Teacher

Baobab Room

Joined Keystone Team: 2021

Current Keystone Grandparent

Education: Bachelor's in Business, Pre-Primary Teacher Training Certification, EEC certification

About Sailaja: Sailaja spent more than 12 years as a toddler teacher before joining Keystone's infant-toddler program, eager to explore more of Montessori educational philosophy & practice.

Why is Keystone special to you?: "I love working with children and seeing kids growing and learning."

Amanda Osborn

Toddler Lead Teacher

Willow Room

Joined Keystone Team: 2019

Education: Bachelor's in Criminal Justice, Montessori Beginnings Course (Center for Guided Montessori Studies), EEC certification

About Amanda: Amanda worked at daycares and as a nanny for more than 10 years before joining Keystone from 2019-2021, during which time she became passionate about Montessori. Amanda returned to Keystone in 2023 and now leads the Willow toddler room. She started AMS Montessori infant-toddler teacher training in October 2023 with the Center for Guided Montessori Studies.

Hobbies: Running, animals, traveling, concerts, spending time with family and friends

Why is Keystone special to you?: "Keystone is special to me because it feels like home! We are a community filled with caring and passionate humans. It has always been a loving and safe environment for staff and students alike!"

Itishree (Iti) Bastia

Toddler Assistant Teacher

Willow Room

Joined Keystone Team: 2018

Education: Master's in Botany, EEC certification

About Iti: Iti had her start in childhood education volunteering in her local school district and was inspired to make it her career. She became a substitute teacher for the district, as well as an assistant teacher at a preschool, before finding a home at Keystone. Since her arrival here, she has contributed to the community as a substitute, assistant, before care teacher, and now assistant teacher for the infant-toddler program.

Hobbies: Gardening, cooking, volunteering, hiking, listening to music

Why is Keystone special to you?: "I love Keystone because it is such a tight knit community."

Nayeli Ureña

Toddler Assistant Teacher

Willow Room

Joined Keystone Team: 2023

Education: Associate's in Psychology (in progress), EEC certification

About Nayeli: Nayeli joins the Keystone team after 6 years in the childcare field, working as a lead teacher with children from 3 months to 13 years old. She is currently pursing an associate's degree in Psychology.

Hobbies: Taking her dog to the park, trying new things

Why is Keystone special to you?: "Keystone is special to me because it seems like a nice big community of educators that really love children and want to help children grow into strong, smart, and kind members of society."

Calista Barillas

Toddler Lead Teacher

Cedar Room

Joined Keystone Team: 2021

Education: Bachelor's in Psychology from University of Nevada, AMS Infant/Toddler Lead Teacher certification from Montessori Training of Southern Nevada, EEC certification

About Calista: Prior to joining the Keystone community, Calista volunteered in a Romanian orphanage and spent 3 years as a Lead Infant/Toddler Teacher in Las Vegas before making the cross-country move eastward.

Hobbies: Scrapbooking, hiking, gardening, playing with my dog

Why is Keystone special to you?: "I already feel at home at this school during this transition to living on the East Coast away from family."

Afshan Maase

Toddler Assistant Teacher

Cedar Room

Joined Keystone Team: 2019 (volunteer), 2023 (teacher)

Current Keystone Parent

Education: Bachelor's and Master's in Chemical Engineering

About Afshan: After an engineering career in the oil and gas industry, Afshan began teaching chemical engineering at the university level. Her children joined Keystone in 2019, and after seeing them flourish in the environment, she became intrigued with Montessori education and was eager to experience and facilitate Montessori firsthand.

Hobbies: Family time, travel, foods

Why is Keystone special to you?: "Keystone is special to me because children are valued and supported with the essential objective of encouraging a love of learning along with developing self-confidence. This, along with the diverse backgrounds of the staff and students/parent community, provide a unique, engaging and welcoming environment. I believe this positive and caring Keystone culture is important for developing young children into caring, compassionate and healthy adults."

Alexandria (Allie) Goodemote

Toddler Assistant Teacher

Cedar Room

Joined Keystone Team: 2023

Current Keystone Parent

Education: Medical assistant certification, Associate's in Early Childhood Education (in progress), EEC certification

About Allie: In addition to her years in the medical assistant field, Alexandria (Allie) has years of experience working with children as a camp counselor, assistant teacher and lead teacher for toddler and preschool age groups. She is currently pursuing an Associate's degree in Early Childhood Education after joining the Keystone team in summer 2023.

Hobbies: Baking, enjoying the outdoors

Why is Keystone special to you?: "I am excited to start this journey at a school with a mission and education that I believe in."

Katie (Kathleen) Oetinger

Children's House Lead Teacher

Birch Room

Joined Keystone Team: 2021

Current Keystone Parent

Education: Bachelor's in Education, Bachelor's in Childhood Developmental Psychology, Montessori lead teacher certificate (AMS), trained in Positive Discipline, Resources for Infant Educarers (RIE), Diversity, Equity, Inclusion and Justice, EEC certification

About Katie: Katie began her teaching career in New Hampshire as a kindergarten teacher in both Montessori and non-Montessori settings. After coming south to Massachusetts, Katie spent seven years as a teacher and program director at a pre-K thru grade 8 Montessori school before becoming a Keystone parent, and now lead teacher in Keystone's Children's House Birch room!

Why is Keystone special to you?: "Keystone is special to me because children are seen and valued for the unique beauty and goodness they bring to the world. The culture at Keystone trusts and supports children in a way that leads to independent, confident and truly happy children."

Nagamalli (Malli) Dutta

Children's House Assistant Teacher

Birch Room

Joined Keystone Team: 2013

Education: Bachelor’s in Commerce & Accounting, EEC certification

About Malli: Before creating her new home at Keystone in Children's House, Malli contributed to a variety of educational projects as a volunteer tutor and after school/summer program teacher.

Hobbies: Walking in nature, photography, meditation (she conducts free weekly meditation classes with friends)

Why is Keystone special to you?: "For me, Keystone is very special as I feel it's like my extended family and I am happy to be around the fun, friendly and caring staff!"

Savannah Zapata

Children's House Assistant

Birch Room

Joined Keystone Team: 2023

Education: Bachelor’s in English with a minor in Education, Master's in Education, Pre-K - Grade 2 teacher licensure (Dept. of Elementary & Secondary Education), EEC certification

About Savannah: Savannah came to Keystone from Texas with almost a decade of experience in youth education under her belt. She has worked with various grade/age levels from toddlers all the way through high school, specializing in English for Elementary age level.

Hobbies: Arts & crafts, taking her dogs on adventures & to the park

Why is Keystone special to you?: "I believe in the Montessori mission of fostering creativity, critical thinking, and independence through positive reinforcement and encouragement. If I had children, I'd want them to learn at a place like Keystone!"

Amanda Frankland

Children’s House Lead Teacher, Art Teacher for the Elementary and Keystone Year Programs

Maple Room

Joined Keystone Team: 2014

Keystone Parent Alumna

Education: Bachelor of Arts, majoring in Graphic Communications, minoring in Fine Arts and Photography from Franklin Pierce College, AMS Lead Teacher Certification from NEMTEC, EEC certification

About Amanda: Amanda began her career as a graphic designer for about 8 years, before starting her own company painting murals and faux finishes. After taking a break to start a family, she followed a new path of art and photography before putting down roots as a teacher at Keystone once her first child became part of the student community. Amanda's diverse skills have evolved her role from substitute, to art teacher, to assistant teacher, up to lead teacher.

Hobbies: Gardening, home improvement, being out in nature, exploring, and art of all types

Why is Keystone special to you?: "The community and the respect for children - I joined the Keystone community originally because it was a place where I felt my child was heard. I stayed because I saw that not only my child, but all the children, had their love of learning supported and nurtured. As it applies to the child, the Montessori philosophy is an integral part of the school’s way of being."

Erica Chilson

Children's House Assistant Teacher

Maple Room

Joined Keystone Team: 2021

Education: Bachelor's in Communication from UNH, minor in Business Administration

About Erica: As a parent of Montessori kids, right away Erica was impressed with the joy her kids had using the materials while learning. During the Keystone remote learning program, she assisted her child with the Montessori activities while gaining a better understanding of the philosophies, and was intrigued, so she jumped at the opportunity to become a teaching assistant at Keystone Montessori. 

Hobbies: Photography, acting, cake decorating, crafts

Why is Keystone special to you?: "I love the community, staff and seeing how my children have flourished."

Charamphorn (Çhon) Oliveri

Children's House Assistant

Maple Room

Joined Keystone Team: 2023

Education: Bachelor's in Business English, Certificate in Business Management, Master's in Linguistics, Toddler and Infant Child Development Associate Credential, Associate's in Early Childhood Education (in progress)

About Çhon: After moving to the US from her native Thailand in 2005, Charamphorn (Çhon) began her career in childcare as an au pair working with children from ages 2 - 10. Following the au pair role, she taught English and Thai to children, and in more recent years, served as an assistant teacher in a K-grade 4 after school program, followed by a toddler assistant teacher position for the last 2 years before joining Keystone in 2023.

Why is Keystone special to you?: "I find that Keystone is the place where children can learn to value their independence. This gives them a foundation of their capability in making good choices and seeking knowledge for themselves."

Sadhna Sharma

Children's House Assistant Teacher

Oak Room

Joined Keystone Team: 2013

Education: Master’s in Psychology, EEC certification

About Sadhna: Sadhna's career in education has spanned almost two decades! She spent 4 years as a teacher of preschool through 3rd grade in her native country of India followed by 7 years running her own licensed home daycare in the US before finding her place at Keystone in 2013 where she has worn the hat of substitute, before/after care teacher, and assistant teacher.

Hobbies: Music, traveling, art

Why is Keystone special to you?: "I love working with kids!"

Dhanashree Karmarkar

Children's House Lead Teacher

Redwood Room

Joined Keystone Team: 2022

Education: Bachelor's in Home Science, Diploma in Fashion Design, Diploma in Indian classical dance (Bharatnatyam), AMS certification, EEC certification

About Dhanashree: Dhanashree's career in education has led her to work with kids from Children's House up through Elementary. She is certified by the American Montessori Society as well as the Department of Early Education & Care. She has spent almost 10 years guiding children as a Children's House assistant for 2 years, CH lead teacher for 5 years, and upper elementary special aid for 2 years. She served as interim lead teacher for the Birch Room in the 22-23 school year before becoming lead teacher of KMS's newest Children's House classroom, Redwood.

Hobbies: Indian classical dance (Bharatnatyam)

Why is Keystone special to you?: "Keystone is special for me because I enjoy being in a Montessori classroom and working with children. Keystone Montessori has a positive vibe which all adults and children bring to school. I came to work for a week in summer 2022 and loved the culture and community at KMS."

Katarina Pecsi Marseglia

Children's House Assistant Teacher

Redwood Room

Joined Keystone Team: 2022

Current Keystone Parent

Education: Bachelor's in Preschool and Elementary Education, EEC certification, 2-year au-pair program, Hotel Management & Culinary certificate

About Katarina: A native of Slovakia, Katarina first trained in hospitality before pursuing her love of teaching with a Bachelor's degree in preschool & elementary education. She worked as an elementary school teacher for children with special needs in an aftercare program for low-income families in addition to as a lead ESL (English as a Second Language) teacher for preschool & kindergarten students. Stateside, she completed a 2-year au-pair program to live, study & care for the children of an American family and later became a preschool teacher for a daycare before joining Keystone.

Hobbies: Spending time with family, cooking, traveling, yoga, nature walks, books, reiki (level 2)

Why is Keystone special to you?: "I loved my first day when I met my co-teachers; everyone greeted me with a warm smile. I felt that this was a place where everyone is kind and respectful, working towards the same goal."

Kruti Pandit

Children's House Assistant

Redwood Room

Joined Keystone Team: 2013

Education: Bachelor's in Commerce, EEC certification

About Kruti: Before joining Keystone, Kruti had taught language and culture at Shishu Bharati School of Indian Languages and Culture for almost a decade, in addition to leading a team of teachers as Head of Language Curriculum there. Since her arrival at Keystone, Kruti has displayed her talents in a wide variety of roles such as substitute teacher, Elementary assistant, Children's House assistant teacher, Before/After Care teacher, lunch assistant, and Discovery Care staff.

Hobbies: Music, arts & crafts, traveling

Why is Keystone special to you?: "Throughout the years I've gotten to know the children, families, and staff, growing to care for them all immensely. Being at Keystone feels like home and I've found a sense of community here."

Rita Banatwala

Elementary Teacher

Joined Keystone Team: 2013

Keystone Parent Alumna

Education: Bachelor's in Mathematics, Montessori Elementary Teacher Training Collaborative (METTC) Certification for Elementary I & II, Redirection Children's Behavior, Positive Discipline certified

About Rita: Prior to her career in education, Rita spent her time in the software world as an engineer, leader & manager. However after subbing and working as an Elementary assistant at Keystone; her children's school, she was drawn to learn and do more with students, so she pursued her Montessori training to become the lead teacher she is today. Montessori is pervasive in Rita's family: both she and her husband attended Montessori schools and her mother was a Montessori teacher!

Hobbies: Family, travel, crafts

Why is Keystone special to you?: "The community and the common goal to improve our world"

Vrinda Ashoka

Elementary Teacher

Joined Keystone Team: 2002

Keystone Parent Alumna

Education: Bachelor's in History, English & Sociology, Bachelor's in History & English, Master's in Reading and Language Arts from UNC-Chapel Hill, Montessori Elementary Teacher Training Collaborative (METTC) Elementary I Certification

About Vrinda: Vrinda started her career teaching middle school and high school English in India. She joined Keystone as a Children’s House assistant when her son, and later her daughter, enrolled as students. Since then Vrinda has worked as assistant in several Children’s House classrooms at Keystone, and also in the Elementary classroom. Her fascination with the Montessori Elementary curriculum and philosophy inspired her to take the Lower Elementary training. She enjoys working with students at the Elementary level, and being a part of their

exploration of the world!

Hobbies: Reading, walking, playing with her cats, nature, travel, family and friends

Why is Keystone special to you?: "I love to see the children’s excitement as they learn. I appreciate the warmth, enthusiasm and support of my colleagues."

Shelly Harris

Elementary Assistant Teacher

Joined Keystone Team: 2019

Current Keystone Parent

Education: Bachelor's in Sociology and Gender Studies from Lehigh University, Master's of Social Work from Boston University in Macro Social Work

About Shelly: With 7+ years doing book-keeping and administration, plus 10+ years of social work experience, Shelly brings both organization and a deep sense of caring for the people in the Keystone community to her role as assistant teacher for Lower Elementary students.

Hobbies: Board games, baking

Why is Keystone special to you?: "Keystone is special to me because it is a place of acceptance, joy, and learning."

Reena Agarwal

Elementary Assistant Teacher

Joined Keystone Team: 2006

Keystone Parent Alumna

Education: Master's in English Literature, EEC certification

About Reena: Reena has been working with children from preschool through elementary age for over 15 years as a teacher and coach. As a Keystone parent, she began as a Children's House substitute and assistant teacher before moving to India where she ran her own preschool for 5 years. Upon returning to the US, she rejoined the Keystone team and established her role as an Elementary assistant teacher.

Hobbies: Reading, cooking, traveling

Why is Keystone special to you?: "Great working environment"

Sarah Buchholz

Elementary Literature Specialist

Joined Keystone Team: 2019

Education: Bachelor's in Elementary Education (College of Charleston); Principal Residency Network (Northeastern University); trained in Restorative Justice and Restorative Practices (Simmons College); currently enrolled in a Montessori Teacher Certification program (METTC) and working toward earning credentials in Elementary II (Upper Elementary)

About Sarah: With over 20 years in education both in public and private schools in the US and abroad, Sarah has served as a lead classroom teacher, assistant principal, reading specialist, instructional coach, and special education associate teacher before landing at Keystone to offer her expertise and delve into the Montessori world of education.

Hobbies: Traveling, learning, reflecting, painting, spending time with family

Why is Keystone special to you?: "It is the people at Keystone who make it such a special place. There is so much love here."

Suman Bhatt (Mrs. B)

Lunch & Aftercare Assistant

Joined Keystone Team: 2005

Education: Bachelor's in Education, Master's in European History, EEC certification, certification in website design and development

About Suman: Suman has been in the field of education since 2002 and has tremendous experience working with children of all ages as a substitute teacher in both Chelmsford and Andover. Known by the children as "Mrs. B," Suman has been supporting the Keystone school community for many years both inside school hours as a teacher assistant, and lunch assistant, and outside as the After Care Coordinator and Discovery Care Coordinator.

Hobbies: Singing devotional songs, dancing, appreciating nature

Why is Keystone special to you?: "Keystone respects employees, and gives freedom to express feelings. After working here for 16 years, I feel Keystone is my second home and the staff is like family."

Rashmi Rao

Before Care Teacher, Full-Time Substitute, Substitute Coordinator

Joined Keystone Team: 2021

Current Keystone Parent

Education: Master's in Arts Management, diploma in Indian classical dance

About Rashmi: After a career as a dance teacher and social media/marketing professional, Rashmi was drawn back to her roots as a Montessori alumna herself, first as an assistant in the infant classroom, and now as a full-time substitute and before care teacher.

Hobbies: Cooking, music, reading, hiking

Why is Keystone special to you?: "As a child, I was enrolled in Montessori and wanted the same for my son. When we toured Keystone for my son, we loved that the children come first. After my son went through his first year at Keystone, I saw how he loves his teachers, and seeing all of his excitement and understanding how the school works got me excited to be part of the school."

Heather Scaffidi

Before Care Teacher, Substitute

Joined Keystone Team: 2015

Keystone Parent Alumna

Education: Bachelor's in Fitness & Cardiac Rehab/Exercise Science

About Heather: Heather first joined the Keystone community as a parent, with all three of her children attending the school over the years. When her youngest child was three, she decided to get involved in the classroom and has assisted/substituted in various age groups ever since. Outside of Keystone, Heather has worked as a dog walker/pet sitter/dog trainer for more than 20 years.

Why is Keystone special to you?: My three children attended and have special memories of their time at Keystone.

Prabha Vajjhala

Interim Children's House Lead Teacher

Oak Room

Children's House Educational Consultant, Substitute

Joined Keystone Team: 1998

Education: Bachelor's in Psychology & Political Science, certified by both AMS (American Montessori Society) from New England Montessori and AMI (Association Montessori Internationale) from London Montessori, EEC certification

About Prabha: Prabha's passion for educating young children and Montessori philosophy have driven her at Keystone since its founding in 1998. Prabha has mentored several Montessori interns and also worked extensively with children who have special needs. Upon becoming a grandmother in 2023, she retired from her position of lead teacher for the Children's House Oak Room, and joined the sub team, continuing to support the Keystone staff and community. In 2024, she returned to the classroom part-time as interim lead teacher of the Oak classroom.

Hobbies: Reading, listening to music, nature walks with family, daily meditation, traveling and exploring new places

Why is Keystone special to you?: "Keystone Montessori School is an outstanding educational institution. It offers a highly academic, multicultural, healthy, neat, and safe environment. It provides the best quality of education for children in every possible way. Keystone also provides excellent resources to the staff and parents. All the staff members are amazing."

Cristina Comes

Spanish Teacher, Substitute

Joined Keystone Team: 2021

Education: Bachelor's in Law, Master's in Legal Practice & Spanish Cultural Studies

About Cristina: Cristina first joined KMS as a substitute in 2021, and then added on the role of Spanish teacher starting in the 22-23 school year. Back in her home nation of Spain, Cristina taught in a pre-K and kindergarten school for several years. Once in the United States, she taught Spanish to first and second graders in the World Language Program at Lane Elementary School in Bedford.

Hobbies: Studying languages, tennis, spending time with family and friends, traveling, visiting new places and learning about cultures and traditions

Why is Keystone special to you?: "Keystone Montessori School gives me the opportunity to meet with children from many different cultures. In addition to a wonderful teaching method, the hands-on learning, and collaborative play, I think it also gives the opportunity to learn with and from peers and teachers, with respect for each other, to develop a positive and outstanding foundation for creative and excellent learning."

Kathy Walton

Music & Drama Teacher

Joined Keystone Team: 2009

Education: Bachelor's in Music, Master's in Ministry, Certifications - Orff Music Level 2, First Steps in Music, Conversational Solfege, Music Together, Montessori (Seacoast)

About Kathy: Kathy has been immersed in teaching music, art and drama for more than 35 years for students from preschool through high school age. Her passion for the arts has been on display conducting private & group music & art lessons, and directing plays and musicals, bringing vibrancy and creative expression wherever her students may be.

Hobbies: Travel, cooking, hiking and kite flying

Why is Keystone special to you?: "Keystone represents peaceful, collaborative, parental and faculty that are supportive, and students that are kind and considerate and ask probing questions."

Rylei Baker

Infant Toddler Aftercare Assistant, Substitute

Joined Keystone Team: 2022

Education: First Aid/CPR certification, current Chelmsford High student

About Rylei: Rylei has several years of babysitting experience under her belt with infants, toddlers and young children, in addition to watching her mom as a nanny growing up herself. She joined Keystone in summer 2022.

Hobbies: Hanging out with friends

Why is Keystone special to you?: "I can learn and understand how to work with kids and guide them as they grow up."

Sujana Purushotham

Substitute

Joined Keystone Team: 2019

Education: Bachelor's of Science, Child Growth and Development Credit

About Sujana: Sujana's journey in education has come full circle. Beginning as an assistant teacher at a Montessori school, she then worked at several other schools before she was drawn back to Montessori, this time at Keystone. Sujana first got involved with KMS as a substitute, became an assistant in the infant-toddler program, and has now returned to subbing.

Hobbies: Cooking, listening to music, spending time with family & friends

Why is Keystone special to you?: "I get to work with people who are like-minded and strive to reach a common goal together: help children grow their potential and learn more."