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American International Montessori School

United States, San Francisco

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The school at a glance
Instructs in English, Mandarin, Japanese
Fees $26,500 - 33,000
Ages 1 - 12 years
Type Co-educational
Opened 2009
Bus Service No
Academic offering
Curriculum Montessori Curriculum
Taught languages English, Japanese, Mandarin
Strengths Languages, Outdoor Education, Performing Arts
Clubs Academic and Intellectual, Cultural and Language, Arts and Creative
Stages Infant/Toddler Care, Preschool, Kindergarten, Elementary
Introduction

American International Montessori School (AIM) is a bilingual Montessori day school serving toddlers to elementary students on two Berkeley/Oakland–area campuses. Founded in 2009 by Ernest Mahr, AIM offers three Montessori programs: Infant Community (18–36 months), Children's House (3–6 years), and Elementary (1st–6th). Language immersion is embedded across all divisions, with toddler tracks in Japanese and Mandarin, and elementary bilingual options in English/Chinese or English/Japanese. Immersion is 100% in the target language for younger children, with English introduced in the afternoon for older students; elementary classrooms maintain all-day language immersion. Classrooms emphasize authentic Montessori materials and native-speaking teachers. Two campus sites host distinct language tracks, with Montessori-trained staff across every classroom. The campus features bright, natural-light rooms, child-sized furnishings, two large play yards, and abundant outdoor and garden activities. After-school enrichment includes sports, art, and dance—most notably Yosakoi Japanese dance—and annual cultural events like Setsubun, broadening students' world awareness and curiosity.

3339 Martin Luther King Jr Way, Berkeley, CA 94703, United States

The Essentials

American International Montessori School has instruction in English, Mandarin, Japanese.

Location

3339 Martin Luther King Jr Way, Berkeley, CA 94703, USA. The campus is in Berkeley, California.

Stages

Infant Community (18–36 months), Children's House (3–6 years), and Elementary (1st–6th grade). Montessori Method is followed in all classrooms.

Type

Montessori day school offering Infant Community, Children's House, and Elementary programs with language immersion across programs: Toddlers dual Japanese/Chinese; Preschool/Kindergarten Japanese/English or Chinese/English; Elementary English/Chinese or English/Japanese. Montessori Method is used in all classrooms.

School day structure

AIM is open from 8:00am to 6:00pm, Monday through Friday, with half-day (3-year-olds only), full day and extended day schedules available. Extended care is subject to availability.

Fees

Annual tuition at American International Montessori School ranges from USD 26,500 to USD 33,000 for 2026/27.

Annual registration & materials fee
- USD 1,000 non-refundable annual registration & materials fee due upon enrollment; this fee may be pro-rated according to start date and covers materials, activities, snacks, cultural celebrations and in-school enrichment activities.

Billing schedule and payment terms (general)
- Tuition is charged on an annual basis. Tuition may be paid in 10 equal installments or as a one-time payment with a 5% discount when paid in full at enrollment (paid-in-full discount applies only upon initial enrollment/re-enrollment and where the school's paid-in-full conditions are met). For mid-year start dates, at least 50% of the school-year tuition must remain to use the paid-in-full discount. Failure to confirm enrollment by the school's stated deadline will disqualify a family from the paid-in-full and sibling discounts.

Infant Community (ages 18–36 months) — annual and per-installment amounts (2026–2027 academic year)
- Annual tuition (year-round program, 8/17/26–7/30/27):
- Half-Day (9:00 AM–12:30 PM): USD 29,200 (if paid in 10 installments: USD 2,920 per installment).
- Full-Day (9:00 AM–3:30 PM): USD 33,000 (if paid in 10 installments: USD 3,300 per installment).
- Extended care (annual):
- AM Care (8:00 AM–9:00 AM): USD 1,900 (USD 190 per installment, if on a 10-installment plan).
- Extended Day (8:00 AM–6:00 PM): USD 5,600 (USD 560 per installment).
- Pre-arranged drop-in daily fee (24 business hours' notice with confirmation): AM: USD 15; PM: USD 30.
- Infant Community tuition is inclusive of daily hot lunch and the toilet-training program.

Children's House (ages 3–6) — annual and per-installment amounts (2026–2027 academic year)
- Annual tuition (year-round program, 8/17/26–7/30/27):
- Half-Day (9:00 AM–1:00 PM; 3-year-olds only): USD 26,500 (if paid in 10 installments: USD 2,650 per installment).
- Full-Day (9:00 AM–3:30 PM): USD 29,200 (if paid in 10 installments: USD 2,920 per installment).
- Extended care (annual):
- AM Care (8:00 AM–9:00 AM): USD 1,700 (USD 170 per installment).
- Extended Day (8:00 AM–6:00 PM): USD 5,400 (USD 540 per installment).
- Pre-arranged drop-in daily fee (24 business hours' notice with confirmation): AM: USD 15; PM: USD 30.

Elementary (Grades 1–6) — annual and per-installment amounts (2026–2027 academic year)
- Annual tuition (academic year 8/17/26–6/4/27):
- Full Day (8:00 AM–3:40 PM): USD 29,000 (if paid in 10 installments: USD 2,900 per installment).
- Extended care (annual):
- Extended Day (8:00 AM–6:00 PM): USD 3,800 (USD 380 per installment).
- Pre-arranged drop-in daily rate (24 business hours' notice): PM: USD 30.

Discounts
- Sibling discount: 5% applied to eligible sibling tuition.
- Paid-in-full discount: 5% when the school's paid-in-full conditions are met (see billing terms above).

Boarding / residential provision
- Boarding is not applicable; AIM operates as a day program (school hours listed as 8:00 AM to 6:00 PM, Monday–Friday). No boarding fees are published.

Other costs and routinely listed additional charges
- Annual registration & materials fee (USD 1,000) is described as non-refundable and covers classroom materials, activities, snacks and in-school enrichment.
- Pre-arranged drop-in fees and extended-care option fees are listed above under each program.
- No uniform fee or separate transportation fee is listed in the published tuition & fees documents for the 2026–2027 program materials.

Refund information
- The USD 1,000 annual registration & materials fee is expressly non-refundable. No comprehensive tuition-refund schedule or general tuition refund policy is published in the tuition & fees documents for the academic year materials reviewed.

Fee payment options (methods)
- The published tuition & fees materials specify the billing schedule and paid-in-full/10-installment options but do not list specific accepted payment methods (for example: credit card, ACH/bank transfer, or check) in the tuition & fees documents.

Key administrative notes related to fees
- Confirmation deadline: Families must confirm enrollment by the school's stated deadline (noted as February 13 in the tuition materials) to remain eligible for the paid-in-full discount and sibling discounts.
- Academic calendars and exact program start/end dates differ by program year (Infant/Children's House year-round dates vs. Elementary academic-year dates); check the program-specific academic calendar when planning billing and start-date proration.
Academics

American International Montessori School teaches Montessori Curriculum for students aged 1 to 12.

Curriculum

Infant Community serves 18-36 months in a Montessori environment with language learning in Chinese and Japanese. Children's House serves 3-6 years and follows the Montessori Method in all classrooms. Preschool/Kindergarten offers a Chinese/English or Japanese/English immersion track. Elementary (1st-6th) provides bilingual immersion in English/Chinese or English/Japanese. Immersion is 100% in the target language for toddlers, with English introduced in the afternoon for older children and all-day immersion in the elementary classroom. There are two campuses, AIM and BIM; language tracks must be chosen before enrollment and switching between tracks is not allowed, with Montessori-trained, native-speaking teachers across all classrooms.

Wellbeing

Social and Emotional Learning (SEL)

Montessori places a major emphasis on intra-personal and inter-personal skills through grace and courtesy. In preschool, children can work independently when they choose, while the elementary program centers on regular work in pairs and small groups to foster collaboration. Students learn to greet others with a handshake and eye contact, express their feelings with words, respect personal needs and workspaces, and work together to maintain the class community. They follow directions and participate in group activities, building social competence across ages. Social and executive skills are integrated throughout both Infant Community and Elementary programs to support personal responsibility and positive interactions.

English as an Additional Language (EAL)

The Language Program uses dual Mandarin Chinese/Japanese immersion from the Infant Community. In Infant Community, two teachers per classroom typically include one Mandarin-speaking teacher and one Japanese-speaking teacher. For Preschool/Children's House, Mandarin Chinese or Japanese immersion classrooms are available, with native-speaking teachers. In Lower Elementary, Mandarin Chinese or Japanese immersion tracks continue, with teachers speaking Mandarin, Japanese, and English to support multilingual development. About half of AIM students arrive not speaking Japanese or Chinese and become conversational in a second language after about three years.

Mental Wellbeing

Mental wellbeing is supported through social and executive skills development. The elementary program builds in autonomy, responsibility, and collaboration through weekly work plans and group activities, fostering persistence, time management, and sustained attention. The preschool program emphasizes social skills like empathy, respect, and positive interaction, while the Infant Community teaches self-regulation and appropriate social behavior. Across programs, children practice expressing feelings, following routines, and resolving conflicts in a supportive, multilingual environment.

Admissions

Admissions

1. FILL OUT THE INQUIRY FORM. The admission team responds to inquiries within 2-3 business days. Submitting the inquiry initiates consideration for your child's placement. You may then proceed to the Open House to learn more about AIM and the admissions process.

2. ATTEND OPEN HOUSE. Next open house is Friday, May 1, 2026. This is a great opportunity to see the classroom and speak with teachers, parent ambassadors and the admission team.

3. SUBMIT AN APPLICATION & SCHEDULE PARENT TOUR. You will receive a link to sign up for a private tour once you submit your application. The tour offers opportunities to see the classrooms in action.

4. RECEIVE INVITATION FOR IC OR CH. When a spot opens up, the admission team will contact you to arrange an expectation meeting with the teachers (IC) or a child visit (CH). Notifications are typically 4-6 months before the joining month. The admission decision will be emailed typically within 2-3 weeks.

5. ENROLLMENT COMMITMENT & WAITING POOL. AIM requires a minimum enrollment commitment through 6 years old for IC/CH, thereby completing the three-year CH program, and a similar three-year commitment for Elementary. Families who cannot commit will not be considered for enrollment. A Waiting Pool System is used; families are added to the waiting pool upon receipt of the completed application form and fee, and if more than two families are suitable for the program, the order of application submission is respected.

Waitlist

The school uses a Waiting Pool System rather than a traditional waiting list. Families are added to the waiting pool upon receipt of the completed application form and fee. The pool balances classroom composition; if more than two families are suitable for the program, the order of application submission is respected.

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