Welcome to Keystone Montessori School
default logo


Cary Williams - Founder, Head of School

Cary Williams holds a BA in early childhood, elementary education, and visual arts. She has earned teaching certification from birth through grade 8. Cary is certified by the American Montessori Society for the 3-6 level, and also the Center for Montessori Teacher Education program for Montessori School Management. In addition, Cary is a certified instructor for International Network for Children and Families (INCAF).

Cary’s career in education has spanned over 30 years. She has worked with children in many capacities including public and private elementary schools, preschools, and day care centers. Cary has taught in both AMI and AMS schools since becoming involved with Montessori in 1977.

Cary is dedicated to creating a community that supports the growth of staff, children, and parents. She is also committed to expanding awareness about child-centered learning and promoting tolerance and understanding of diversity.

Lisa Ciesluk - Assistant Head of School

Lisa joined Keystone in 2012, bringing her diverse work experience in business and education. Her background of working in corporate finance, business, and as a Montessori Assistant Teacher helped make Lisa the perfect candidate for her role here at Keystone. Ever since joining Keystone, Lisa has created a positive work environment, built strong family relationships, streamlined the billing process, and improved communications among our community.

Lisa earned her B.S. in Business Administration/Marketing from Centenary College, NJ in 2002. She also has a strong science and math background. Once Lisa set foot into the Montessori classroom, she knew exactly where she wanted to be. She strongly believes in the Montessori philosophy, and has a deep respect and love for children. Lisa is also a Certified Infant & Toddler Specialist. In her spare time, she enjoys life on the lake, spending time with her kids, playing music, and volunteering her time coaching basketball. Her children started their Montessori education as early as 2 years old through elementary.

Lisa Eisenberg - Chief Financial Officer
Lisa Eisenberg joined Keystone as CFO in 2003. In this capacity, she consults with key staff to help the school access the financial resources needed for growth and for the consistent delivery of an outstanding educational program. Lisa advises other small corporations and brings a wealth of financial and managerial expertise and ingenuity to the school. She is a graduate of Harvard University, and her children have attended Montessori school.
Prabha Vajjhala - Founding Teacher

Children’s House Room 3, Oak: Morning & Afternoon Classroom

Prabha joined Keystone in 1998 when the school was founded. She has her Montessori teaching certificate from London Montessori in England,as well as her certification from the New England Montessori Teacher Education Center. Prabha holds a bachelor’s degree in Political Science and psychology. Prabha has also taught kindergarten in India, and worked extensively with children with special needs.

Erin Puranananda - Lead Teacher

Children’s House Room 6, Bamboo: Full Day Classroom

Erin Puranananda received her bachelor’s degree from Tufts University in International Relations and Spanish. She began her career in marketing and publishing but gave up that line of work to begin a family and raise her children. As a parent, Erin investigated the options for early childhood education for her children and was quickly drawn towards the benefits of Montessori. She was most impressed by the methods and its philosophy for teaching to the whole child. While her children were enrolled at Keystone, Erin helped as a Reading Mom and then began working as a Substitute for all of the Children’s house classrooms. Because of her new-found passion for working with young children, Erin joined the Keystone family in 2012 as the Assistant in the Oak Room morning class. During the summer of 2014 she attended the New England Montessori Teacher Education Center and completed her Montessori teaching certification. Erin is now the Lead Teacher in one of our Full Day classrooms.

Mayra Sheehan - Associate Teacher

Children’s House Room 6, Bamboo: Full Day Classroom

Mayra joined Keystone in 2016 as the new Associate Teacher in Room 6 with Mrs. P. Mayra brings a lot of energy and confidence in the classroom. Her educational background includes a B.S. in Business Administration/Finance in 2013 from Framingham State University, and in 2015 her AMS Certification through the New England Montessori Teacher Education Center. Mayra is fluent in both English & Spanish.

Sadhna Sharma - Before Care Teacher & Lunch Assistant and Aftercare Teacher

Children's House Room 6, Bamboo: Full Day Classroom

Sadhna joined Keystone in 2014 as substitute teacher, and now serves as the lunch assistant and aftercare teacher in Room 6, Bamboo. She holds a Masters Degree in Psychology from Gokuldas College in India. She taught in India for children beginning preschool age through 3rd grade for a number of years before moving to North America. Once moving to the United States, Sadhna earned her daycare license and successfully ran a home daycare for 6 years, taking care of children ages 12 months to 4 years old. Sadhna is also part of the Discovery Care staff.

Kye-Youn Jun - Lead Teacher

Children’s House Room 4, Birch: Full Day Classroom

Kye-Youn has a bachelor’s degree in Child Studies and a master’s degree in Early Childhood Education from Seoul Women’s University. While raising her two daughters, she became interested in Montessori education and sent both of them to Montessori schools. She completed her Montessori training at Northeast Montessori Institute in 2009, receiving her credentials for Early Childhood teaching. After completing her internship here at Keystone in 2008, she became an associate teacher in Children’s House. Prior to her Montessori training, she had extensive experience teaching children, receiving the Teacher of the Year award in 2007 from the Korean School of New England and the Best Teacher of the Year award from the New England Chapter of the National Association for Korean Schools. Kye-Youn is licensed to practice play therapy and dance therapy in Korea. She also plays the piano and enjoys incorporating music into her classroom. She finds inspiration for teaching from seeing children walk down the aisle during graduation ceremonies displaying their pride and confidence after 3 years of hard work. It gives her great satisfaction to see that she has contributed in some way to their growth and development.

Suman Bhatt - Lunch Assistant and After Care Coordinator

Children’s House Room 4, Birch: Full Day Classroom

Suman joined Keystone in 2005 as part of our After School Care program. She holds a bachelor’s degree in Education from Kanpur University, India. She has been in the field of education since 2002, and has had tremendous experience working with children of all ages as substitute teacher in both Chelmsford and Andover.

Suman has worked as lunch assistant for many years and also co-ordinates the After School Care program and Discovery Care program for our Children’s House students. She is lovingly called “Mrs. B” by both students and staff.

Patrick McGlinchy - Lead Teacher

Children’s House Room 5, Kapok: Full Day Classroom

Patrick teaches in our full day Children’s House classroom. He joined Keystone in 2005. Patrick holds a bachelor degree is in Political Science from LeMoyne College. After working in politics for ten years, Patrick fulfilled his true desire to be a Montessori teacher. He attended Montgomery Montessori Institute in Maryland, and is certified by the American Montessori Society. Before joining Keystone, Patrick taught for several years in the Washington, D.C. area. Patrick is an advocate for stronger Science curriculum and in the primary classroom and has presented at National Conferences. Both of his children have attended Keystone. His youngest son continues his education here in our Elementary program.

Amanda Frankland - Elementary Art Teacher / Assistant Teacher

Amanda received a Bachelor of Arts degree from Franklin Pierce College in Graphic Communication with a concentration in Illustration and Photography. After working in the graphic design field for a number of years, she turned to her passion for art when she started and ran a company painting murals and faux finishes for a few more years. After deciding to stay home to raise a family, she continued to show her art in local galleries and shows. When it came time for her oldest to start preschool, she found Montessori and specifically Keystone and it has been a perfect fit for her family.

With 2 children currently enrolled in Keystone, she has been very involved in the Keystone Community and began substituting in the Children's House classrooms in 2013 as a regular substitute for the Keystone Year program. As the Elementary Art teacher she is able to bring her passion for art and her knowledge of many different mediums, styles and artists to the students of Keystone and is looking forward to assisting them in their creations! Recently, in 2015, Amanda joined Mr. McGlinchy's classroom as his new Assistant Teacher.

Kruti Pandit - Lunch Assistant and Aftercare Teacher

Children's House Room 5, Kapok: Full Day Classroom

Kruti joined Keystone in 2013, first working as a substitute teacher, then working as an assistant in the EL classroom. Over the years, Kruti has been able to work across all of our classrooms, serving as Before Care Teacher, Lunch Assistant, and Discovery Care Staff. Most recently, she is now the Lunch Assistant and After Care Teacher in the Kapok Classroom.
Kathryn Wilkins - Lower Elementary Lead Teacher and Curriculum Coordinator
Kathryn is an experienced Lower Elementary Teacher, who joined Keystone in 2012, and has helped grow our Elementary program. She holds a Masters of Education in Elementary Ed, an American Montessori Society certification for Level I through the Seacoast Center for Montessori training. She also holds a Massachusetts professional level teaching license in PreK - 6 for students with and without disabilities, and has been working in the classroom for over 10 years in both public and private Montessori schools. In her time at a public Montessori charter school, she developed an in-depth understanding of the Massachusetts' state frameworks and the skills necessary to bring the Montessori philosophy and teaching methods to a larger audience.

Kathryn is a certified Positive Discipline and Engineering-is-Elementary teacher trainer. She is also Orton-Gillingham trained in both level I & II, which has strengthened the language program here at Keystone. She also enjoys working with adult learners, and strongly believes in sharing her experiences with others, presenting at local and national conferences and workshops. Recently she presented on Engineering in the Elementary Classroom at both the Montessori Schools of Massachusetts conference and the AMS conference. Kathryn is a life-long learner who continues to grow through on-going professional development. In her spare time, Kathryn enjoys spending time in the outdoors, camping, and hiking with her family.
Rita Batatwala - Upper Elementary Teacher and Lower Elementary Co-Teacher

Rita has been a vital part of the Elementary growth over the past several years, in both the Lower and Upper EL programs. Rita joined Keystone in 2008 as a Children’s House and an Elementary substitute. Then, in 2013 she was hired as Elementary Assistant Teacher. After spending a year as Assistant Teacher in the elementary classroom, Rita attended the Montessori Elementary Teacher Training Collaborative (METTC) in Lexington., and now holds an AMS Teaching Certification in both Level I and II.

She holds a BS in Mathematics from the University of New Hampshire. She worked as a software engineer for several years from Desktop Publishing to Document imaging, as an individual contributor, team leader and manager. After growing up in a Montessori household herself, both of Rita’s children attended Keystone. Rita believes in the Montessori philosophy and both she and her husband took the Re-Directing Children’s Behavior class, giving a strong foundation to their family.

Vrinda Ashoka - Assistant Teacher

Elementary Classroom

Vrinda has been a valuable classroom assistant here at Keystone since 2002. Her calm demeanor and gentle approach with children make her a great asset to our program. Vrinda has a Masters in Education, specializing in reading and language arts, from University of North Carolina Chapel Hill. She has also taught English to middle-school and high-school students in India.

Malisa Landrum - Elementary Aftercare Teacher

Malisa joined Keystone in 2012 working as an assistant in our Elementary classroom and also in our Children's House Aftercare program. Most recently, she now leads our EL students in fun activities in our Elementary Aftercare program, incorporating drama and dance. She has an extensive dance background beginning at age 9 and continuing through today. She is a graduate of the High School for Creative and Performing Arts and spent a few years traveling with the C.A.P.A Dance Company, and then with the New Freedom Theater. She graduated with a BFA in Dance Education from the University of the Arts. Since graduating she has immersed herself in the early education of children and is excited to have this opportunity to merge these two worlds; aligning the art of dance with academics and serving the whole child.

Alicia Barck - Spanish Teacher

Alicia was born in Madrid, Spain. She lived in the United States for two years as a child, making her keenly aware of how early exposure to language is essential to fluency. Alicia graduated from UMass Lowell with a degree in Business Administration and a minor in Computer Science.

She joined Keystone in 1999, providing a weekly Spanish language session to every classroom. At Keystone, she teaches small groups of preschool and elementary children, using engaging activities, songs, games, and stories. Her class sessions bring Spanish to life, and children easily learn a variety of vocabulary and become conversant in Spanish.

Kathy Walton - Music and Art Specialist

Kathy joined Keystone in 2009 as our Art and Music Specialist. Trained as an Orff music teacher, she brings movement, rhythm, and pitch to our classrooms. Working with a variety of Orff instruments, drums, and percussion, she makes music come alive for all of Keystone’s children.

Kathy taught art for years in California, and brings a variety of media to our students. Observing our world, then representing their observations using paints, paper, pencil, collage, and other materials, each child has the opportunity to express their own vision and creativity.

Dipika Bhavsar - Substitute Teacher/Discovery Care Staff

Dipika joined Keystone in 2011 as part of our Before School Care team as well as a lunch assistant to Patrick McGlinchy. She has served as lunch assistant and aftercare assistant in our Children's House program. This year, she continues to be part of the Discovery Care staff and also is a substitute teacher in both our EL and CH programs.

Ibeliza Tovar - Substitute Teacher

Ibeliza is completing her certification from the New England Montessori Training Center. She has been volunteering as a children’s reading specialist with non-profit organizations in the area for several years. Ibeliza holds a degree in Business Organization from her native Venezuela. She is fluent in both Spanish and German, having lived in Germany for several years. She strongly believes that we are all part of a world community and is particurarly impressed with the rich diversity in cultural backgrounds here at Keystone.

Anna Kritselis - Information Technology
Anna joined KMS in 2008 after working in the private sector for in a variety of systems-related and management level positions before providing IT consulting services to various Montessori schools in the area. She graduated from West Chester University with a B.S. in Music Education and then from Northeastern University with a M.S. in Information Systems. She currently works with Andover, Oak Meadow , Keystone, Pincushion Hill and Shrewsbury Montessori School.


Keystone Montessori School, its Director, and staff maintain affiliations with the following organizations:

American Montessori Society
Montessori Schools of Massachusetts
International Montessori Council
National Association for the Education of Young Children
Boston Chapter of NAEYC
Educators for Social Responsibility
North American Montessori Teacher’s Assocation
International Network for Children and Families