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Substitute Teacher

Keystone Montessori School
Chelmsford, MA Full Time
POSTED ON 5/22/2026
AVAILABLE BEFORE 6/20/2026

Company Description

Keystone Montessori School is located in a beautifully renovated historic mill building, offering students 17,000 square feet of thoughtfully designed classroom space, including an art room. Serving children aged 3 months to 12 years, the school provides individualized education that nurtures each child’s passions through engaging Montessori materials. With a dedicated team of Montessori-trained head teachers and experienced classroom assistants, Keystone is committed to creating an environment where children can thrive. Known for excellent teacher retention, the school has supported hundreds of families with its year-round programs. Located in Chelmsford, MA, Keystone inspires creativity and innovation through Montessori education, as endorsed by influential figures like the founders of Google.


Role Description

Keystone has part-time floater and substitute teacher positions available for its 2026 Summer Program for students ages 3 months through Kindergarten. 

Starting out as a substitute teacher is a great way to learn and grow as a teacher, learn about Montessori philosophy, and work in a professional environment with staff who are committed to early childhood education. A substitute must demonstrate strong classroom management experience and the confidence to direct the classroom in a positive and fun way, representing our school in a professional manner at all times. They must have a positive attitude and be a team player. 


Qualifications

  • Experience working with children
  • Understanding of the Montessori philosophy – preferred, but not required
  • EEC Certification – preferred, but not required
  • Ability to work collaboratively with faculty
  • Commitment to meeting the needs of each child
  • First Aid & CPR certification preferred but not required


Hourly rate range: $16 - $25, depending on certification(s) and experience

Salary : $16 - $25

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