Short, sourced definitions of the Montessori words you meet in books, classrooms and on school tours. Each entry links to a full explanation or to the guide where we cover the idea in practice. New to the method? Start with what Montessori is, in plain English.
Montessori terms A to Z
- Absorbent mind — see The Absorbent Mind: Neuroscience Behind How Children Learn
- AMI (Association Montessori Internationale) — see Montessori AMI vs AMS: The Critical Certification Differences
- AMS (American Montessori Society) — see Montessori AMI vs AMS: The Critical Certification Differences
- Autoeducation — Autoeducation (self-education) is Montessori’s term for the way children build their own skills and understanding through activity they choose, in an environment prepared for them, rather than by being taught directly.
- Casa dei bambini — Casa dei Bambini is Italian for “Children’s House.” It was the name of the first Montessori classroom, opened in Rome in January 1907, and it is still used for the Montessori classroom for children aged about 3 to 6.
- Concrete to abstract — Concrete to abstract is the Montessori principle that a child first meets an idea through something they can touch and manipulate, and only later works with it mentally, in symbols or on paper.
- Control of error — Control of error is the feedback built into a Montessori material or activity that lets a child notice and correct their own mistake, without an adult pointing it out.
- Cosmic education — see The Montessori Elementary Classroom: Structure & Learning Goals
- Cultural extensions — Cultural extensions, or the cultural area, are the parts of the Montessori classroom that open the child to the wider world. They cover geography, botany, zoology, history, science, art and music.
- Dancers mobile — see DIY Munari Mobile: Free Printable Template + Exact Measurements
- Didactic materials — Didactic materials is Montessori’s term for the learning materials she designed for her classrooms, such as the pink tower, knobbed cylinders and golden beads.
- Directress (director, guide) — Directress (or director) is the word Maria Montessori used for the adult in the classroom. Today many schools say guide. The word stresses that the adult directs the environment and the child’s activity rather than lecturing.
- Dressing frames — see Montessori Practical Life Materials: Purpose & Implementation
- Environmental design — see The Montessori Prepared Environment: The Third Teacher
- Erdkinder — see Erdkinder: Montessori’s Farm School For Adolescents
- Fine motor skills — see Montessori Practical Life Materials: Purpose & Implementation
- Geometric cabinet — see Geometric Cabinet Montessori: An Introduction to Geometric Shapes
- Gobbi mobile — see DIY Munari Mobile: Free Printable Template + Exact Measurements
- Grace and courtesy — Grace and courtesy are the Montessori lessons in social life. Through short, playful demonstrations, children practice how to greet someone, interrupt politely, offer help or say no kindly.
- Gross motor skills — see Montessori Movement Area: Complete Setup Guide (0–12 Months)
- Hands-on activity — A hands-on activity, in Montessori, is work the child does with their hands on real objects or materials, so that an idea is felt and manipulated before it is put into words or symbols.
- Holistic education — see The Montessori Method: What It Actually Means (Not the Instagram Version)
- Language materials — see Montessori Language Materials: How They Build Reading & Writing Skills
- Linear counting — Linear counting is the group of Montessori math activities in which a child counts in a continuous line, with bead bars and chains, building fluency from 1 to 1,000 and preparing skip counting.
- Mixed age classroom — see Montessori Mixed-Age Classrooms: The Youngest, the Oldest & Everyone Between
- Montessori method — see The Montessori Method: What It Actually Means (Not the Instagram Version)
- Munari mobile — see DIY Munari Mobile: Free Printable Template + Exact Measurements
- Nido — see Montessori Nido Program: A Nurturing ‘Nest’ For Infants
- Normalization — Normalization is Maria Montessori’s word for the change she saw in children who find work that truly absorbs them. They become calmer, more focused, more independent and kinder to others.
- Parts of speech (grammar symbols) — see Montessori Grammar Symbols, the Chart and What Each Shape Means
- Positive discipline — see A Montessori Parent’s Guide to Positive Discipline
- Practical life materials — see Montessori Practical Life Materials: Purpose & Implementation
- Prepared environment — see The Montessori Prepared Environment: The Third Teacher
- Psychic embryo — Psychic embryo (also “spiritual embryo”) is Montessori’s image for the newborn, just as the body formed in the womb, the child’s mind and personality continue to form after birth, built from what the child absorbs from the surrounding world.
- Rainbow mobile — see DIY Munari Mobile: Free Printable Template + Exact Measurements
- Self directed learning — Self-directed learning, in Montessori, means the child chooses what to work on, how long and how often to repeat it, inside an environment the adult has prepared and with clear limits.
- Sensitive periods — see Montessori Sensitive Periods: How To Recognise Them & Respond
- Sensorial materials — see Montessori Sensorial Materials: What They Are & How They Work
- Skip counting — see Montessori Skip Counting: Materials, Lessons & Activities
- Spontaneous repetition — Spontaneous repetition is a child’s urge to repeat the same activity again and again, by choice, until an inner need is satisfied. Montessori saw it as a sign of real learning and concentration.
- The Farm (Erdkinder) — see Erdkinder: Montessori’s Farm School For Adolescents
- Three period lesson — see The Three-Period Lesson: Montessori’s Simple Trick for Teaching New Words
- Timeline of humans — see Montessori Cultural Studies Materials: From Continents To Animal Habitats
- Timeline of life — see Montessori Cultural Studies Materials: From Continents To Animal Habitats
- Vertical grouping — Vertical grouping means placing children of different ages, usually across about three years, in the same Montessori class, for example 3 to 6, 6 to 9 or 9 to 12.
- Visual discrimination skill — see Montessori Sensorial Materials: What They Are & How They Work
- Work cycle — The work cycle has two meanings in Montessori. It is the long, uninterrupted work period of the day, often about three hours in the 3 to 6 classroom. It is also each child’s own cycle of choosing an activity, working with it, repeating it and putting it back.
- Zoology cabinet — The zoology cabinet refers to the Montessori zoology materials, usually stored together. They include animal puzzles, parts-of-animal cards and classification work that introduce young children to the animal kingdom.
How we write these definitions
Each term is checked against Maria Montessori’s own books (The Montessori Method, The Secret of Childhood, The Discovery of the Child, The Absorbent Mind) and current AMI and AMS material. We separate what Montessori wrote from how schools apply it today, and we say so when research is thin.