What training do Montessori assistants need?
Montessori's training organizations publish the rules for earning their teacher credentials; for assistants, AMI's lineup includes a dedicated Montessori Classroom Assistant course that its training centres run alongside the diploma courses.
State child care licensing sets its own staff requirements separately, state by state.
This page covers the courses that exist, how to compare them, and how training fits the move from assistant to lead teacher.
Is training required for Montessori assistants?
The credential rules these organizations publish cover their teacher credentials: AMS awards full credentials to graduates of AMS-affiliated teacher education programs who hold a bachelor's degree, and MACTE accredits Montessori teacher education programs.
AMI's published lineup includes a dedicated course for assistants — the Montessori Classroom Assistant course.
Our research found no Montessori-wide training requirement for assistants, so the requirement question comes down to the school doing the hiring and to the state.
So what each school asks for is the school's own call: read the postings for the jobs you want before you pay for anything — they show what each school actually requires.
For what the job involves day to day, the Montessori assistant career guide covers the role itself; this page is only about training.
Then there is the state layer, which is separate from Montessori training altogether.
States set the education rules for people working in child care, and they differ: BLS says childcare workers' typical entry-level education is a high school diploma or equivalent, and that some states have no education requirement at all for entry-level childcare positions.
How those rules reach an assistant job is a state-by-state question.
Confirm with your licensing agency
Assistant course options
The assistant-specific course: AMI. AMI training centres worldwide offer diploma courses by age level — Assistants to Infancy for ages 0-3, Primary for ages 3-6, Elementary for ages 6-12 — plus a Montessori Classroom Assistant course.
The length, schedule and price of that course were not part of the material our research reviewed, so contact the training centre — or AMI/USA for U.S. courses — for current dates, format and fees.
The credential route above assistant: AMS. AMS awards full credentials to graduates of AMS-affiliated teacher education programs who hold a bachelor's degree; high-school graduates without a bachelor's can earn an AMS Associate credential at the Infant & Toddler and Early Childhood levels.
AMS says its credential typically takes 1-2 years, with in-person or blended coursework and a yearlong mentored practicum that can be completed at your current Montessori school — so you can train at the school where you already work.
Each affiliated program sets its own schedule and tuition.
The accreditation check: MACTE. When you compare programs, MACTE — the Montessori Accreditation Council for Teacher Education — is the reference point.
It has been recognized by the U.S. Secretary of Education since 1995 and accredits Montessori teacher education programs from Infant & Toddler through Secondary II and Administrator levels.
MACTE accredits the program itself, not the college or school that houses it, so the question to ask is whether that specific program holds accreditation.
If you need an online-friendly format, note MACTE's rule: a program delivering more than 50% of its academic content online must still require at least 120 residential hours in person.
- Which age level does the course prepare me for, and does it match the classroom I work in?
- Is the program an AMI course, an AMS-affiliated program, or accredited by MACTE?
- What are the dates, the format, and the full cost — and what does each fee cover?
- Will my school recognize the course — and would it sponsor or pay for part of it?
Moving from assistant to lead teacher
On the training side, the next step after assistant training is a Montessori teacher credential; what a lead-teacher job actually requires is set by the school and the state, so check the postings and your licensing agency. Montessori teacher certification compares the AMI, AMS and other MACTE-accredited routes in detail — age levels, cost and how to choose.
The short version: AMI's route is a diploma course at your age level, and AMS's route is a credential from an affiliated program.
AMI/USA describes AMI training as covering educational theory, child developmental psychology, classroom observation, practice teaching and material preparation, taught by AMI-certified trainers, and describes the AMI diploma as recognized worldwide.
On the AMS side, the practical bridge for a working assistant is the practicum: AMS says its credential typically takes 1-2 years, and the yearlong mentored practicum can be completed at your current Montessori school.
The Associate credential is AMS's route for candidates without a bachelor's, at the Infant & Toddler and Early Childhood levels; the full credential requires a bachelor's degree.
Cost, by example rather than average: Montessori Center of Minnesota lists total tuition of $14,500 for its in-person AMI 3-6 Diploma Course in 2026-27 on a nine-month format, plus a $75 application fee.
Montessori Northwest lists Primary tuition of $14,500-$14,750 depending on format, a $150 application fee, about $250-$300 for books, $300-$600 for supplies and $99 for AMI membership, and its Primary trainees complete at least 90 hours of observation.
Those are published prices from named training centres — examples of the scale, not an average across programs.
Money help exists on the AMI side: AMI/USA runs a fund that awards partial scholarships — tuition reductions — toward AMI training in the U.S., and lists Montessori schools that offer to sponsor trainees.
If you are already working as an assistant, your own school is the natural first place to ask.
For the whole arc of the role — settings, duties, requirements and pay — see the Montessori teacher career guide.
This page is career information, not licensing or legal advice. Training rules for child care staff are set state by state — confirm the current requirements with your state child care licensing agency.