A Montessori teacher — Association Montessori Internationale (AMI) calls the lead classroom teacher a guide — teaches in a Montessori classroom, with training organized by the age band that classroom serves.
The role spans infant-toddler through adolescent levels in private, public and charter settings.
In 2021–22, the 2,441 US private K–12 schools with a Montessori program emphasis reported 17,643 full-time-equivalent teachers to NCES.
What is a Montessori teacher?
A Montessori teacher teaches in a Montessori classroom.
Montessori training bodies such as the American Montessori Society (AMS) and Association Montessori Internationale (AMI) issue credentials and diplomas by age band, from infant-toddler through adolescent.
The job carries several titles: a posting may say Montessori teacher, guide, lead guide or lead teacher for the lead role.
AMI's own name for the lead classroom teacher is guide, and it trains classroom assistants through a separate certificate course.
The credential level and the age band define the role more than the title does.
NCES's Private School Universe Survey counted 2,441 US private K–12 schools with a Montessori program emphasis in 2021–22 — 8.2% of private schools — enrolling 98,388 students.
Those schools reported 17,643 full-time-equivalent teachers and a pupil/teacher ratio of 5.6.
The survey excludes pre-K-only programs and prekindergarten students, so stand-alone early-childhood Montessori settings sit outside that count.
In the same survey year, 1,260 private K–12 schools reported membership in the American Montessori Society (AMS), 591 in the Association Montessori Internationale (AMI), and 594 in other Montessori associations.
AMS and AMI are membership and credentialing bodies for the method, not state agencies — the credential section below explains how their credentials work.
Montessori levels: infant-toddler, primary, elementary, adolescent
Montessori training is organized by age band rather than by grade level: you train for the band your classroom serves, and each training body names its levels in its own way.
The American Montessori Society (AMS) issues credentials at these levels:
- Infant & Toddler (birth–age 3).
- Early Childhood (ages 2½–6).
- Elementary I (ages 6–9) and Elementary I–II (ages 6–12).
- Secondary I (ages 12–15) and Secondary I–II (ages 12–18).
- Administrator, plus a Montessori Inclusion Endorsement.
Association Montessori Internationale (AMI) offers diploma courses at:
- Assistants to Infancy (ages 0–3).
- Primary, also called Children's House (ages 3–6).
- Elementary (ages 6–12).
- Adolescent (ages 12–18).
AMI diploma courses are examined by external examiners appointed by AMI, and the level structures do not map one-to-one: AMS splits elementary into a 6–9 and a 6–12 option, while AMI issues a single 6–12 elementary diploma.
Match the band, not just the school.
An early-childhood credential and an elementary credential are different programs at both AMS and AMI, and AMI's elementary diploma covers the whole 6–12 band while AMS splits it — so an application should name the band its training covers.
Lead guide vs assistant
The Montessori training bodies treat the lead and assistant roles separately: AMS credentials and AMI diplomas are issued by age band, and AMI lists a Montessori Classroom Assistant certificate course apart from its diploma courses.
The lead guide — AMI's own term for the lead classroom teacher is guide — trains for a specific level, and AMI diploma courses are examined by external examiners AMI appoints.
Name that level when you apply for a lead role.
For the assistant role, AMI's course list pairs its diploma courses with certificate courses, including the Montessori Classroom Assistant course.
Do you need a Montessori credential?
Montessori credentials come from training bodies rather than from a state: the American Montessori Society (AMS) issues credentials, Association Montessori Internationale (AMI) issues diplomas, and MACTE accredits Montessori educator preparation programs.
Entry requirements differ by body and level.
A full AMS credential, earned through an AMS-affiliated teacher education program, requires at least a bachelor's degree from a regionally accredited US college or university, or an evaluated equivalent.
AMS also offers an Associate credential at the Infant & Toddler and Early Childhood levels only, for candidates with a high school diploma or GED who do not hold a bachelor's degree.
AMI runs diploma courses at the Assistants to Infancy, Primary, Elementary and Adolescent levels, each examined by external examiners the institute appoints.
MACTE — the Montessori Accreditation Council for Teacher Education — accredits Montessori educator preparation programs rather than issuing credentials, and it has been recognized by the US Secretary of Education since 1995.
Keep the credential types separate in your head: a Montessori credential comes from the training body, and a state teaching certificate comes from a state education agency.
Whether a school or a state also wants the certificate depends on the state and the school.
Confirm before you enroll
Private, public and charter Montessori schools
Montessori jobs sit in private schools, district public schools, and charter schools, and each setting changes who you answer to and which teacher rules reach you.
The private count comes from NCES: 2,441 schools carried a Montessori program emphasis in 2021–22, enrolling 98,388 students.
Read each private school's posting on its own terms for the credential and salary it offers.
Public school districts run Montessori schools and programs too: the National Center for Montessori in the Public Sector's Montessori Census counted 596 public Montessori schools and programs across 43 states and Washington, DC, serving just under 200,000 children, as reported in June 2026.
Of those, the census counts 230 as charter schools; the rest are district schools, including magnets.
Teacher rules differ by setting and state.
Public Montessori classrooms operate within their state's public-school teacher rules, and charter Montessori classrooms follow their state's charter teacher rules, alongside whatever Montessori credential the school asks for.
At private schools, whether a state certificate is involved depends on the state and the school's category.
Check the rules that reach your setting with the state education agency before you sign a contract.
Career information, not legal advice: credential and certification requirements vary by state, school and age level — confirm current requirements with your state education agency, the school and the training body.
Montessori teacher pay
There is no official Montessori teacher salary to quote: our research found no BLS occupation code for Montessori teachers and no AMS, AMI or NCES salary series that breaks the role out.
Read any posted range as that school's own scale, not an industry average: compare postings directly, and ask each employer how the credential level and the calendar affect the offer.
Find Montessori teacher jobs
Browse Montessori teacher jobs on SchoolHires to see current openings from private, independent and charter schools.
Applications go further when they mirror the posting: name your credential level next to the age band you're applying for, and note any state certificate you hold.
Describe your classroom work with that level's materials, and name your training band — Early Childhood or Primary, Elementary I or I–II — plainly.
On the employer side, schools and Montessori networks can post a Montessori job on SchoolHires.