Generated by Rank Math SEO, this is an llms.txt file designed to help LLMs better understand and index this website.

# Montessori RD: Montessori Research and Development (Montessori RD) provides Montessori educational materials for children and teaching manuals for educators, serving Montessori schools and teacher training programs in the United States and internationally.

## Sitemaps
[XML Sitemap](https://www.montessorird.com/sitemap_index.xml): Includes all crawlable and indexable pages.

## Posts
- [Visual Perception & Concept Development](https://www.montessorird.com/visual-perception-concept-development/): A child’s acquisition of language begins at birth and progressively develops. Maria Montessori identified a phase of development during which a child’s receptivity to language acquisition is profoundly heightened. She referred to this phase as the “Sensitive Period for Language,” which begins at birth and extends through the first six years of life.
- [Common Core State Standards](https://www.montessorird.com/common-core-state-standards-article/): We at Montessori R&D have some exciting news: we recently developed a material that addresses kindergarten language arts Common Core State Standards (CCSS). It is the first in a series of CCSS based materials.
- [Pink Reading Series](https://www.montessorird.com/pink-reading-series/): For over three decades our Pink Reading Series has been the phonics material in thousands of classrooms, guiding many young minds as they enter the fascinating world of reading.   
- [The Fundamental Needs of Humans](https://www.montessorird.com/the-fundamental-needs-of-humans-mrd/): You and I as individuals, and, collectively, as societies, rely on numerous human inventions to facilitate our daily activities. All of the human-made objects in our lives have a lineage that can be traced back thousands of years to the ingenuity and labor of our ancestors meeting their physical needs for food, clothing, shelter, communication, land and water transportation, and physical health. Our ancestors shared these needs from the moment they started inhabiting Earth. ?
- [Purposeful Movement](https://www.montessorird.com/purposeful-movement/): Dr. Montessori regarded movement as an essential element in a child's intellectual development. Part of the magic of all Montessori's materials comes from the movement routines associated with their use. The brain stores, processes, and retains information more efficiently when stimulation produced by movement supplements the information perceived by the senses.

## Pages
- [CMS2026](https://www.montessorird.com/cms2026/): *Offer expires March 9th
- [Resources](https://www.montessorird.com/mrd-resources/): Recommended Reading Montessori Books for Download
- [Checkout](https://www.montessorird.com/checkout/)
- [MTEC](https://www.montessorird.com/mtec/): Infant & Toddler Teaching Manuals Set
- [Protected: Montessori Research & Development – Trine University](https://www.montessorird.com/trine/): Early Childhood Teaching Manual Set
- [Wishlist](https://www.montessorird.com/my-wishlist/): There are no products on the Wishlist!
- [Wishlist](https://www.montessorird.com/wishlist/): There are no products on the Wishlist!
- [My account](https://www.montessorird.com/montessori-account/): A link to set a new password will be sent to your email address.
- [Cart](https://www.montessorird.com/cart/): Your cart is currently empty. Return to shop
- [Shop](https://www.montessorird.com/shop/)
- [Books For Download](https://www.montessorird.com/books-for-download/): The Montessori Method by Maria Montessori
- [Recommended Reading](https://www.montessorird.com/recommended-reading/): Montessori: Evidence Based Reading Curricula
- [Reyhan TEST](https://www.montessorird.com/reyhan-test/): asd
- [Montessori RD Online](https://www.montessorird.com/montessori-rd-online/): For the last three years, we have been secretly working on the first-ever Montessori Online Hub.
- [Protected: Ed Videos](https://www.montessorird.com/ed-videos/): Videos prior to Pamela's feedback
- [You Have Completed Checkout](https://www.montessorird.com/checkout-complete/): Thank you!
- [Shipping & Returns](https://www.montessorird.com/shipping-returns/): This page is reserved for your Shipping & Returns Policy.
- [Purchase Gift Certificate](https://www.montessorird.com/gift-certificate/)
- [Jane Wechlser](https://www.montessorird.com/about-us/jane-wechlser/): Jane Wechlser holds an M.A. and an AMS Early Childhood, Elementary I and Elementary II Teacher Credential. She founded The Montessori Family Schools in the Berkeley, CA area. Jane brings over 25 years experience as a teacher, teacher trainer and consultant. 
- [Virginia Varga](https://www.montessorird.com/about-us/virginia-varga/): Virginia Varga, Ph.D. is founder and former Director of Gloria Dei Montessori School in Dayton, OH. Ginny is an internationally known Infant and Toddler specialist. She began the first Montessori Toddler Class in the U.S. in 1966. A member of the school consultation team of AMS since 1966, she served on the American Montessori Society (AMS) National Board of Directors from 1964-1972. She has a B.S. in education (University of Dayton), AMS/AMI Primary credentials (Greenwich) and an AMS Infant and Toddler credential. Ginny was inducted into the Ohio Women’s Hall of Fame. In 1999, she received an Honorary Ph.D. from the University of Dayton, Dayton, OH.  In 1994 Dr. Virginia Varga received the AMS Living Legacy award.
- [Virginia Fleege](https://www.montessorird.com/about-us/virginia-fleege/): Dr. Virginia Fleege founded the Midwest Montessori Teacher Training Center in Evanston, Illinois, with her husband, Dr. Urban Fleege, in 1965.  Dr. Fleege is a seminal figure in the US Montessori community and has taught thousands of teachers and children.  Her Early Childhood Geography & History Manual has been the foundation for thousands and thousands (!) of lessons in Montessori classrooms.
- [Judy Bauerlein](https://www.montessorird.com/about-us/judy-bauerlein/): Judy Bauerlein holds an M.Ed. and AMS Early Childhood, Elementary I and Elementary II Teacher Credential.  In 2010 the American Montessori Society (AMS) honored her with the title of Living Legacy, recognizing the valuable leadership role she has had in the Montessori community, not just in the United States, but internationally.  Ms Bauerlein taps her decades of experience as a Montessori teacher to author articles published in Montessori Life, M: Montessori and other leading Montessori magazines.  Her Elementary Language Arts V Manual that covers grammar is second to none!  Additionally, she has received numerous grants for Montessori related research and has served as American Montessori Society board member and President.  Additionally, she spends her summers training Montessori teachers for Princeton Center Teacher Education in New Jersey and Montessori Teacher Education Center in California, Florida and Taiwan. 
- [Linda Aaquist](https://www.montessorird.com/about-us/linda-aaquist/): Linda Aaquist holds a B.S. and AMS Early Childhood, Elementary I and Elementary II Teacher Credential. She has taught in Montessori classrooms for over 30 years and brings her passion and expertise in science to the Biology, Botany, Chemistry, Functional Geography, Physics and Zoology.  Ms. Aaquist spends her summers training Montessori teachers at Princeton Center for Teacher Education in New Jersey and Montessori Teacher Education Center in California, Florida and Taiwan.
- [Manuals for Teachers](https://www.montessorird.com/manuals-for-teachers/)
- [Materials for Children](https://www.montessorird.com/materials-for-children/)
- [Register](https://www.montessorird.com/register/)
- [Pamela Rigg](https://www.montessorird.com/about-us/pamela-rigg/): Dr. Pamela Zell Rigg received her AMS Early Childhood Teacher Credential in 1967 and subsequently earned her AMS Elementary and Infant and Toddler credentials. Dr. Rigg’s degrees include a BA In English Literature and an MA in Early Childhood Education from New York University. Additionally, she has an MA in Educational Psychology from the University of Arizona. Her Ph.D. is in Education in Math, Science and Technology from UC Berkeley.
- [Contact Us](https://www.montessorird.com/contact-us/)
- [Help & FAQ](https://www.montessorird.com/faq/)
- [About MR&D](https://www.montessorird.com/about-us/)
- [Home](https://www.montessorird.com/)
- [<span>MRD</span> Blog](https://www.montessorird.com/blog/)
- [Wish Lists](https://www.montessorird.com/wish-lists/)
- [Check Balance](https://www.montessorird.com/gift-certificate-2/check-balance/)
- [Purchase Gift Certificate](https://www.montessorird.com/gift-certificate-2/)
- [Orders](https://www.montessorird.com/order-history/)
- [Addresses](https://www.montessorird.com/addresses/)
- [Account Settings](https://www.montessorird.com/my-account/)
- [Sign in](https://www.montessorird.com/login/)

## Products
- [Geography Research Cards](https://www.montessorird.com/product/geography-research-cards/): Our Geography Research Cards are thoughtfully designed to guide children through meaningful, hands-on exploration of the continent. Each card invites learners to actively engage with maps by locating and identifying oceans, seas, landforms, countries, and borders.
- [Sensorial Teaching Manual – Early Childhood SPANISH](https://www.montessorird.com/product/sensorial-teaching-manual-early-childhood-spanish/): This manual presents the Sensorial Materials in a sequential manner, with an emphasis on consistency across the materials and within each material. The manual provides a rationale for how the Montessori Sensorial materials are presented.
- [Mathematics Teaching Manual – Early Childhood SPANISH](https://www.montessorird.com/product/mathematics-teaching-manual-early-childhood-spanish/): This manual covers linear counting from red rods to long bead chains, decimal system from golden beads to bead frame and memorization of operations.
- [MTEC ONLY Mathematics Teaching Manual Vol. 3 – Elementary II (9-12)](https://www.montessorird.com/product/mathematics-teaching-manual-vol-4-elementary-ii-9-12-mtec/): FOR MTEC ONLY: Part 1 of Math III Manual
- [Mathematics Teaching Manual Vol. 5 – Elementary II (9-12)](https://www.montessorird.com/product/mathematics-teaching-manual-vol-5-elementary-ii-9-12/): The Mathematics Teaching Manual Volume 5  explores many different strands of mathematics building on the Study of Fractions and Study of Decimals. Lessons on Ratio and Proportion provide a practical foundation, showing how every percentage problem can be solved through proportion equations.
- [Zoology Early Childhood Nomenclature SPANISH](https://www.montessorird.com/product/zoology-early-childhood-nomenclature-spanish/): Three-Part Cards: 177 cards
- [Botany Early Childhood Nomenclature SPANISH](https://www.montessorird.com/product/botany-early-childhood-nomenclature-spanish/): Three-Part Cards: 207 cards
- [Word Study Control Book](https://www.montessorird.com/product/word-study-controlbook/): Control Book for Word Study
- [Trine University Elementary II](https://www.montessorird.com/product/tu-ele2/): Trine University students' academic package, Elementary II Teacher Manuals
- [Biology Manual Traditional Edition](https://www.montessorird.com/product/biology-manual-traditional-edition/): Biology Manual Traditional Edition for MTEC includes:
- [Language Arts for the 2 Year Old (Chinese)](https://www.montessorird.com/product/language-arts-for-the-2-year-old-chinese/): When examining communication and language development, the age of the child is taken into account along the following age groupings:
- [Health and Safety for the Infant-Toddler Teacher Manual (Chinese)](https://www.montessorird.com/product/health-and-safety-for-the-infant-toddler-teacher-manual-chinese/): Written and implemented safety and health policies and procedures are critical to providing base level care for the young child. The safety and health policies and procedures are available to all adults providing care to the young child. The policies and procedures are updated periodically as safety and health agencies, and commonly accepted practice suggest. The Family Policy Committee reviews and makes recommendations to the group care facility regarding the safety and health policies and procedures. The adults in the group care setting annually review health and safety policies and procedures and generate suggestions for changes. State licensing regulations are reviewed and integrated into the safety and health procedures and policies. Affiliation and accreditation standards in regards to safety and health are reviewed and also integrated into the policies and procedures.
- [Functional Geography Impressionistic Charts Set 2 Small](https://www.montessorird.com/product/functional-geography-impressionistic-charts-set-2-small/): The Functional Geography charts, in conjunction with the Functional Geography experiments,* develop the elementary child's understanding of our Earth. They give an impression of Earth's natural phenomena using simple pictures. The objective is to strike the imagination of the child. These charts follow the First Great Lesson from Dr. Montessori: "The Formation of the Universe."
- [Functional Geography Impressionistic Charts Set 2 Large](https://www.montessorird.com/product/functional-geography-impressionistic-charts-set-2-large/): The Functional Geography charts, in conjunction with the Functional Geography experiments,* develop the elementary child's understanding of our Earth. They give an impression of Earth's natural phenomena using simple pictures. The objective is to strike the imagination of the child. These charts follow the First Great Lesson from Dr. Montessori: "The Formation of the Universe."
- [Functional Geography Impressionistic Charts Set 1 Small](https://www.montessorird.com/product/functional-geography-impressionistic-charts-set-1-small/): The Functional Geography charts, in conjunction with the Functional Geography experiments,* develop the elementary child's understanding of our Earth. They give an impression of Earth's natural phenomena using simple pictures. The objective is to strike the imagination of the child. These charts follow the First Great Lesson from Dr. Montessori: "The Formation of the Universe."
- [Botany Impressionistic Charts Small](https://www.montessorird.com/product/botany-impressionistic-small/): The Botany Impressionistic Charts are designed to strike the child's imagination with simple, clear illustrations that depict the basic needs and functions of plants.
- [Trine University Elementary I](https://www.montessorird.com/product/tu-ele1/): Trine University students' academic package, Elementary I Teacher Manuals
- [Trine University Early Childhood Manuals](https://www.montessorird.com/product/tu-ecset/): Trine University students' academic package, Early Childhood Teacher Manuals (2024 edition)
- [Word Study Set 4](https://www.montessorird.com/product/word-study-set-4/): Word Study Set #4 focuses developing skills to organize and use reference materials effectively. Learn about classification, alphabetical order, and guide words, and gain confidence in using a dictionary and thesaurus.
- [Word Study Set 3](https://www.montessorird.com/product/word-study-set3/): Word Study Set 3 covers essential punctuation and grammar rules. From recognizing capital letters and learning about abbreviations, to understanding apostrophes, possessives, commas, and quotation marks, students will build a solid foundation for writing and editing their own work.
- [Word Study Set 2](https://www.montessorird.com/product/word-study-set2/): Word Study Set #2
- [Word Study Set 1](https://www.montessorird.com/product/word-study-set-1/): Compounds, Roots/Suffixes, Prefixes/Roots
- [Plant Evolution Manual](https://www.montessorird.com/product/plant-evolution-manual/): Embark on a journey through the captivating world of plant evolution with our comprehensive manual.
- [The Clock of Eons](https://www.montessorird.com/product/the-clock-of-eons/): Booklets:
- [Ladybug Beetle Life Cycle Wallchart](https://www.montessorird.com/product/ladybug-beetle-life-cycle-wallchart/): Wallchart and Labels
- [Spider Life Cycle Wallchart](https://www.montessorird.com/product/spider-life-cycle-wallchart/): Wallchart and Labels
- [Ant Life Cycle Wallchart](https://www.montessorird.com/product/ant-lifecycle-wallchart/):  
- [Butterfly Life Cycle Wallchart](https://www.montessorird.com/product/butterfly-life-cycle-wallchart/): Wallchart and Labels
- [Timeline of Plant Evolution – Banner](https://www.montessorird.com/product/timeline-of-plant-evolution-banner/): Our Timeline of Plant Evolution is a cladistic representation of plant phylogeny. The journey begins hundreds of millions of years ago with green algae, the ancestral organism, and depicts the lineage of land plants, vascular plants, seeded plants and flowering plants.
- [Elementary II Teaching Manuals – Complete Set](https://www.montessorird.com/product/elementary-ii-teaching-manuals-complete-set/): Regular Price $699.50
- [Elementary I Teaching Manuals – Complete Set](https://www.montessorird.com/product/elementary-i-teaching-manuals-complete-set/): Regular Price $918.00
- [Concept Development- Opposites](https://www.montessorird.com/product/concept-development-opposites/): What concepts are opposite from each other? The Opposites cards allow the child to exercise the following skills:
- [Zoology Elementary Nomenclature Booklets](https://www.montessorird.com/product/zoology-elementary-nomenclature-booklets/): 16 laminated, coil-bound booklets
- [Geometry Elementary Nomenclature Booklets](https://www.montessorird.com/product/geometry-elementary-nomenclature-booklets/): Geometry concepts represented:
- [Botany Elementary Nomenclature Booklets](https://www.montessorird.com/product/botany-elementary-nomenclature-booklets/): Plant parts, shapes and types represented:
- [Functional Geography Impressionistic Charts Set 1 Large](https://www.montessorird.com/product/functional-geography-impressionistic-charts/): The Functional Geography charts, in conjunction with the Functional Geography experiments,* develop the elementary child's understanding of our Earth. They give an impression of Earth's natural phenomena using simple pictures. The objective is to strike the imagination of the child. These charts follow the First Great Lesson from Dr. Montessori: "The Formation of the Universe."
- [Botany Impressionistic Charts Large](https://www.montessorird.com/product/impressionistic-charts-botany/): The Botany Impressionistic Charts are designed to strike the child's imagination with simple, clear illustrations that depict the basic needs and functions of plants.
- [Word Study](https://www.montessorird.com/product/word-study/): The Word Study is a core language arts material for all Montessori elementary classrooms.
- [Consonant Blend Reading (Blue) Series Classroom Package](https://www.montessorird.com/product/blue-series-complete-set/): Consonant Blend Reading (Blue) Series Classroom Package
- [Montessori Kids Universe IT](https://www.montessorird.com/product/montessori-kids-universe-it/): MKU TRAINING INSTITUTE students' academic package, Infant and Toddler.
- [Concept Development – Rhyming](https://www.montessorird.com/product/concept-development-rhyming/): Which words rhyme? The Rhyming Cards allow the child to exercise the following skills:
- [Concept Development – Association](https://www.montessorird.com/product/concept-development-go-together/): Which objects belong together? The Association Cards allow the child to exercise the following skills:
- [Visual Perception – Whole to Parts](https://www.montessorird.com/product/concept-development-whole-to-parts/): Which animal pattern matches which animal? The Whole to Parts: Association Cards allow the child to exercise the following skills:
- [Geometric Solids Matching Cards](https://www.montessorird.com/product/geometric-solids-matching-cards/): Three-Part Cards: 30 cards
- [Montessori Kids Universe EC](https://www.montessorird.com/product/montessori-kids-universe-ec/): MKU TRAINING INSTITUTE students' academic package, Early Childhood.
- [Language Arts Teaching Vol. 4 – Elementary I (6-9)](https://www.montessorird.com/product/language-arts-teaching-vol-4-elementary-i-6-9/): 203 pages
- [BCE/CE Timeline Banner](https://www.montessorird.com/product/bce-ce-timeline-banner/): This BCE/CE Timeline Banner is the full size version of the timeline included in the Fundamental Needs of People.
- [Biology Teaching Manual – Elementary II (9-12)](https://www.montessorird.com/product/biology-manual-new-edition-2019/): The Biology Teaching Manual introduces the concepts of observation and classification and proceeds into lessons of living/ non-living, cell structure, domain categories, kingdom categories and the "Tree of Life" before exploring the kingdoms in depth. This content lays the foundation for NGSS cross cutting concepts of evaluating (argue, critique, analyze) as a basis for scientific learning.
- [Biogeochemical Cycles Complete Set](https://www.montessorird.com/product/biogeochemical-cycles-complete-set/): Biogeochemical Cycles included:
- [The Fundamental Needs of Humans](https://www.montessorird.com/product/the-fundamental-needs-of-humans/): Three-Part Cards:
- [Homonyms](https://www.montessorird.com/product/homonyms/): 72 Strip Cards72 corresponding overlap cards
- [End Marks](https://www.montessorird.com/product/end-marks/): 60 Strip Cards60 corresponding overlap cards
- [Capitalization](https://www.montessorird.com/product/capitalization/): 32 Strip Cards32 corresponding overlap cards
- [Prepositions](https://www.montessorird.com/product/prepositions/): 60 strip cards60 corresponding overlap cards
- [Interrogatives](https://www.montessorird.com/product/interrogatives/): 21 strip cards21 corresponding overlap cards
- [Singular – Plural](https://www.montessorird.com/product/singular-plural/): 68 strip cards68 corresponding overlap cards
- [The Days of the Week, Early Childhood](https://www.montessorird.com/product/the-days-of-the-week-early-childhood/): Booklets:
- [The Months of the Year, Early Childhood](https://www.montessorird.com/product/the-months-of-the-year-early-childhood/): Three-Part Cards: 39 Cards
- [Ladybug Beetle & Its Life Cycle](https://www.montessorird.com/product/ladybug-beetle-its-life-cycle/): Three-Part Cards: 57 cards
- [Spider & Its Life Cycle](https://www.montessorird.com/product/spider-its-life-cycle/): Three-Part Cards: 48 cards
- [Ant and Its Life Cycle](https://www.montessorird.com/product/ant-and-its-lifecycle/): Three-Part Cards: 45 cards
- [Butterfly & Its Life Cycle](https://www.montessorird.com/product/butterfly-its-life-cycle/): Three-Part Cards: 54 cards
- [Cuerpos Geometricos  Three-Part Cards for Geometric Solids](https://www.montessorird.com/product/cuerpos-geometricos-three-part-cards-for-geometric-solids/): Three-Part Cards: 30 cards
- [Formas de Tierra y Agua-  Three-Part Cards for Land and Water Forms  in Spanish](https://www.montessorird.com/product/formas-de-tierra-y-agua-three-part-cards-for-land-and-water-forms-in-spanish/): Three-Part Cards: 30 Cards
- [Vegetables – Matching Cards SPANISH](https://www.montessorird.com/product/vegetables-matching-cards/): Three-Part Cards: 64 Cards
- [Frutas Completa a Mitad – Matching Cards for fruits (whole to half)](https://www.montessorird.com/product/frutas-completa-a-mitad-matching-cards-for-fruits-whole-to-half/): Three-Part Cards: 64 Cards
- [Frutas Completa a Completa – Matching Cards for fruits (whole to whole)](https://www.montessorird.com/product/frutas-completa-a-completa-matching-cards-for-fruits-whole-to-whole/): Three-Part Cards: 64 cards
- [Spanish Pink Series, Three-Part Cards](https://www.montessorird.com/product/spanish-pink-series-three-part-cards/): Phonic Three-Part Cards:
- [Spanish Pink Series, Initial Sound Cards](https://www.montessorird.com/product/spanish-pink-series-initial-sound-cards/): 267 cards:
- [Spanish Pink Series, Picture Cards with Word Labels](https://www.montessorird.com/product/spanish-pink-series-picture-cards-with-word-labels/): Spanish Picture Cards with Word Labels 120 cards
- [Spanish Pink Series, Picture Cards](https://www.montessorird.com/product/spanish-pink-series-picture-cards/): Spanish Picture Cards
- [Extensions for the Colored Cylinders](https://www.montessorird.com/product/extensions-for-the-colored-cylinders/): The Montessori Sensorial curriculum develops and refines the senses. Our Sensorial materials are extensions to the classic Sensorial materials through which the child can explore color, shape, and size.
- [Montessori Rating Scales Early Childhood Quality Principles](https://www.montessorird.com/product/montessori-rating-scale-early-childhood-quality-principles/): The Montessori Rating Scale for Early Childhood Quality Principles (MRS-EC-QP) is a measurement tool for determining if a Montessori early childhood teacher is conducting a classroom according to Montessori principles, practices and outcomes.
- [Practical Life for the  2 Year Old (Chinese)](https://www.montessorird.com/product/practical-life-for-the-2-year-old-chinese/): 179 pages
- [Sensorial for the 2 Year Old (Chinese)](https://www.montessorird.com/product/sensorial-for-the-2-year-old-chinese/): 100 pages
- [Montessori Pedagogy for the Infant-Toddler Teacher Manual (Chinese)](https://www.montessorird.com/product/montessori-pedagogy-for-the-infant-toddler-teacher-manual-chinese/): 107 pages
- [Environments for the Infant-Toddler Teacher Manual (Chinese)](https://www.montessorird.com/product/environments-for-the-infant-toddler-teacher-manual-chinese/): 111 Pages
- [Visual Perception – Look Alike](https://www.montessorird.com/product/concept-development-look-alike/): 24 cards (6 pairs per scenario, 2 scenarios)
- [Concept Development Vertebrates – Invertebrates](https://www.montessorird.com/product/concept-development-vertebrates-invertebrates/): 26 cards (12 cards for vertebrates, 12 cards for invertebrates, 2 label cards)
- [Concept Development – Parts of the Plant We Eat](https://www.montessorird.com/product/concept-development-parts-of-the-plant-we-eat/): 36 cards (5 cards per category, 6 categories) 6 label cards
- [Concept Development – Kinds of Transportation](https://www.montessorird.com/product/concept-development-transportation/): 27 cards (3 categories, 8 cards per category) and 3 categorization cards
- [Concept Development Living – Non-Living](https://www.montessorird.com/product/concept-development-living-non-living/): 26 cards (12 cards for living, 12 cards for non-living and 2 label cards)
- [Concept Development Animal – Plant](https://www.montessorird.com/product/concept-development-animal-plant/): 26 cards
- [Visual Perception – Figure-Ground](https://www.montessorird.com/product/concept-development-figure-ground/): 72 cards (36 pairs figure-ground) 3 categories:
- [The Phases of the Moon, Elementary](https://www.montessorird.com/product/the-phases-of-the-moon-elementary/): This material is part of the Montessori astronomy curriculum for elementary level. At the primary level, children learned to identify the appearance of the moon as seen from the Earth, and the name of its phases. At the elementary level, children learn about the phases of the moon and its position in relation to the Earth and the Sun, which occurrence is fascinating. Children observe the eight moon phases while it orbits the Earth. The Phases of the Moon includes the following components: the Phases of the Moon, the New Moon Phase the Waxing Crescent Moon Phase, the First Quarter Moon Phase, the Waxing Gibbous Moon Phase, the Full Moon Phase, the Waning, the Gibbous Moon Phase, the Last Quarter Moon Phase, and the Waning Crescent Moon Phase. The material consists of 27 sets of three-part nomenclature cards that contain a description, a label, and a picture card for matching purposes. There is one wallchart representing all the parts together. The booklet serves as control for error for the nomenclature matching work.
- [The Phases of the Moon, Early Childhood](https://www.montessorird.com/product/the-phases-of-the-moon-early-childhood/): Three-Part Cards: 27 Cards
- [Booklet Holder](https://www.montessorird.com/product/booklet-holder-container/): Clear Booklet Holder/Container
- [Phonic Reading (Pink) Series Classroom Package](https://www.montessorird.com/product/pink-series-complete-set/): Phonic Reading (Pink) Series Classroom Package
- [Sensorial Materials Three-Part Cards](https://www.montessorird.com/product/sensorial-materials-three-part-cards/): Three Part Cards 66
- [Spatial Relationship Cards](https://www.montessorird.com/product/spatial-relationship-cards/): Spatial Relatoinship Cards:
- [Biogeochemical Cycles, The  Calcium Cycle](https://www.montessorird.com/product/biogeochemical-cycles-the-calcium-cycle/):  Booklets:
- [Biogeochemical Cycles, The Phosphorous Cycle](https://www.montessorird.com/product/biogeochemical-cycles-the-phosphorous-cycle/):  Booklets:
- [Biogeochemical Cycles, The Sulfur Cycle](https://www.montessorird.com/product/biogeochemical-cycles-the-sulfur-cycle/):  Booklets:
- [Biogeochemical Cycles, The Nitrogen Cycle](https://www.montessorird.com/product/biogeochemical-cycles-the-nitrogen-cycle/): Three-Part Cards:  36 cards
- [Biogeochemical Cycles, The Carbon Cycle](https://www.montessorird.com/product/biogeochemical-cycles-the-carbon-cycle/): Three Part Cards:  36 Cards
- [Biogeochemical Cycles, The Oxygen Cycle](https://www.montessorird.com/product/biogeochemical-cycles-the-oxygen-cycle/): Three-Part Cards:  30 Cards
- [Infant & Toddler Teaching Manuals Set](https://www.montessorird.com/product/infant-and-toddler-manuals-set/): Complete set of Infant & Toddler Teacher Manuals (2025 edition):
- [Elementary I & II Teaching Manuals – Complete Set](https://www.montessorird.com/product/elementary-manuals-set/): (Discount is already reflected on the price)
- [Fractions Curriculum Teaching Manual](https://www.montessorird.com/product/fractions-curriculum-teacher-manual/): Note: This manual has been developed to assist the presentation of our Fractions Curriculum Material.
- [Money Curriculum Teaching Manual – Early Childhood (3-6) & Elementary I (6-9)](https://www.montessorird.com/product/money-curriculum-teacher-manual/): The money activities in this manual parallel the Montessori linear counting sequence, from the Number Rods through the Hundred Board.