An Intentionally Calm Place
Imagine a tranquil, unhurried sanctuary designed specifically for the deep-thinking child. In this thoughtfully prepared space, young minds are completely absorbed in purposeful work, wrapped in a quiet calm where deep concentration naturally takes root.
In this intimate classroom, children move with grace and intention. A child accidentally spills a drop of water and calmly wipes it away; another gently sweeps the floor after snack time. Small hands carefully carry delicate wooden materials from the shelves, treating every tool and object with profound respect.
You might see a child patiently waiting for a guide to introduce a new lesson, or working, resting, and returning to their task at their own natural rhythm. Every moment is an exercise in self-direction, emotional regulation, and quiet independence.
This is not a chaotic playroom—it is a peaceful, living community where children master the art of focus and self-reliance.
Welcome to Rainbow Montessori Preschool.


Welcome to Our Special Place
Dear families, it is an honor to welcome you to Rainbow Montessori Preschool.
Founded as a family-driven micro-school in Rancho Cucamonga, our mission is to offer an elite, uncompromisingly authentic Montessori experience.
We serve children ages 2.5 to 6, aligning with the AMS Early Childhood development credential.
Rooted in Dr. Maria Montessori's scientific, child-centered approach, our environment fosters deep independence, freedom within limits, and profound respect for each child's natural psychological growth.
Through hands-on, self-directed learning in a peaceful multi-age community, children cultivate deep concentration, resilience, and a genuine love for discovery. Above all, we nurture a spirit of peace, kindness, and community responsibility—building a strong emotional and character foundation long before academic milestones are reached.
We are immensely proud to announce that as of August 10, 2026, we are officially Verified by the American Montessori Society (AMS)—a testament to our dedication to the highest standards of authentic Montessori education. We are the only Verified School affiliating with the AMS in Southern California.
Please note: we are not a regular child care center, but a unique, highly-specialized learning environment.

Authenticity, Excellence, and a Richly Enriched Experience
Not all Montessori schools are the same. Because the term "Montessori" is not legally trademarked, any preschool can adopt the name without truly implementing the methodology. At Rainbow Montessori Preschool, we hold ourselves to the gold standard of early childhood education.
We are officially Verified by the American Montessori Society (AMS)—meaning our school met rigorous, verified standards requiring our Head of School to hold AMS credentials and our classrooms to faithfully execute the 5 core principles of authentic Montessori:
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Mixed-age primary groupings (ages 2.5 to 6)
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Child-led learning tailored to individual development
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The uninterrupted morning work cycle to protect deep focus
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A complete suite of specialized, authentic Montessori materials
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Trained, expert guidance leading the classroom
The Child at the Center
In our classroom, the child is the true center of the environment. Rather than sitting passively, children are empowered to follow their unique interests and learn at their own pace. Through deep engagement with tactile materials and a trained guide who carefully observes and "follows the child," profound respect and genuine self-regulation take root. We also weave flexible cultural studies and creative arts into the curriculum, ensuring every child’s unique capabilities and interests are deeply honored.
Beyond Montessori: Our Robust Enrichment Suite
While authentic Montessori builds an extraordinary cognitive and academic foundation, Rainbow Montessori Preschool offers an all-inclusive micro-school experience that goes further:
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Advanced Physical Education: PE is a crucial daily routine, not an afterthought. Through fun, structured activities like dance, aerobics, yoga, and strength training, children build balance, coordination, strength, and endurance—fostering mental well-being, resilience, and lifelong healthy habits.
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Multilingual Environment: Weekly Spanish and Vietnamese lessons (and built-in Italian vocabularies and phrases under phonetic Montessori language development) maximize cognitive flexibility and neuroplasticity.
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Weekly Hands-On STEM: Dedicated scientific experiments in physics, chemistry, and biology where children think, question, and test ideas like mini-scientists.
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Art & Music Integration: Dedicated creative expression, music theory, musical terms, instruments, and Montessori bells to nurture a deep sense of aesthetic appreciation, rhythm, and sensory exploration.
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Cooking & Gardening: Hands-on food preparation and plant care that teach real-world math, fine motor control, life skills, and a mindful connection to nature and nutrition.
On the academic aspect, Montessori curriculum has 5 main areas:

Practical Life

Sensorial

Math

Language

Culture Studies
Which includes Geography, Botany, Zoology, Science, Art, and Music
Practical Life Skills
Children engage in meaningful real-life activities that refine fine motor skills, bring confidence in self-care, care for others, care for the environment. Examples are dressing, using tools, cleaning, sweeping the floor, serving foods, caring for plants, caring for the classroom.
The curriculum also teaches Grace and Courtesy which is specific, respectful social behaviors and manners to foster respect, empathy, and community.
This is the beginning of Montessori values in the curriculum that nourish: Independence, Concentration, Coordination, Responsibility and Order.
Sensorial Learning
Our sensorial materials help children learn through hands-on exploration using their senses—touching, seeing, and experiencing concepts in a meaningful way. Children work with materials that isolate one concept at a time, allowing for deep understanding and mastery. Children explore:
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Size and dimension
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Shape, volume and spatial awareness
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Color recognition, matching, grading
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Texture and touch (rough/smooth, soft/hard)
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Sound discrimination (identifying differences, pitches in sound)
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Weight and pressure (heavy/light)
This approach helps children move from concrete learning to abstract thinking, building a strong academic foundation by making a path for logical and mathematical mind development.
Math
Our math program focuses on deep understanding through hands-on learning. Using concrete materials, the children understand the fundamentals of math deeply. Depend on child’s readiness, they will learn:
Early Math (Ages 2–4)
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Number recognition and counting
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One-to-one correspondence
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Sorting and classifying
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Patterns and sequencing
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Comparing quantities and other variables
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Measuring and volume exploration
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Shapes, geometry and spatial awareness
Advanced Math (Ages 5–6)
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Addition and subtraction with concrete materials, up to thousands
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Place value (units, tens, hundreds, thousands)
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Skip counting
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Operations with written problems
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Fractions
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Introduction to time and basic data concept
Language
The program focuses on spoken language, phonetic awareness, writing (creating words with the moveable alphabet), and reading.
Language development in carefully-curated pathway. Pre-language activities include conversation building, rhymes, storytelling, opposites, pattern, and many other activities way before they learn letter sounds. Children learn how to correctly control pencils to make lines before they write letters.
It moves from concrete materials to abstract concepts. Children will use a movable alphabet to construct words, sentence before they write on lined paper. In this order, sound identification, letter-sound correspondence, word building, sentence building, word families and grammar. This prepares children for a successful transition into kindergarten and beyond.
And because the Montessori method was developed in Italy, with Italian being entirely phonetic. Italian will be introduced and used as a tool to teach children building words from each sound explicitly.
Cultural Studies
Refers to the whole aspect of the world: geography, history, science, cultural diversity, art and music:
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Zoology & Botany Science (animals, plants, habitat, natural environment, the ecosystem and interconnection of all livings)
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Geography (maps, countries, continents, the earth and solar system)
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Culture (history, people, community, traditions and diversity)
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Music & Art (creative expression, music appreciation, musical instruments, development of listening skills, rhythm, musical terms, musical cultures)
With a background in Biological Science, this is the most intensive area that we can teach children early scientific concept, critical thinking and encyclopedic knowledge.
Everything You Need to Know
Connect With Our Montessori Family
Have questions about curriculum, admissions, or our teaching philosophy? We are here to support your family's journey in nurturing independence and responsible little children. Use contact form for general questions.
Consider enrollment ? Book an Admission Consultation appointment.
Please go to Admission page, read about our process and fill out the Interest Form to book an appointment.
Our School
9817 Base Line Road Rancho Cucamonga, CA 91730
Contact Us
Phone: (909) 477-7091
Email: rainbowmontessori2026@gmail.com
Learning Hours
Monday - Friday: 8:00 AM - 5:30 PM
Saturday - Sunday: Closed



















