Core Knowledge Foundation
Core Knowledge Foundation is a 501(c)(3) nonprofit that develops and distributes a comprehensive K-8 curriculum built on its Core Knowledge Sequence, offering most materials as free open educational resources to U.S. schools, homeschool families, and teachers while selling print editions and professional learning services.
- Company typePrivate
- Founded1986
- HeadquartersCharlottesville, United States
- Headcount11–50
- GTM typeB2B and B2C
- OfferingServices
What Core Knowledge Foundation does
Core Knowledge Foundation is a 501(c)(3) nonprofit educational organization founded in 1986 by E.D. Hirsch Jr. and headquartered in Charlottesville, Virginia. It develops and distributes a comprehensive K-8 curriculum portfolio built on the Core Knowledge Sequence — a detailed, grade-by-grade content blueprint covering language arts, history and geography, science, mathematics, visual arts, and music. The foundation's products include Core Knowledge Language Arts (CKLA), Core Knowledge History and Geography (CKHG), Core Knowledge Science (CKSci), Core Knowledge Mathematics (CKMath), Core Knowledge Visual Arts (CKVA), and Core Knowledge Music (CKMusic), along with the Core Classics literature series and state-specific curricula such as Louisiana Bayou Bridges.
The organization distributes the majority of its curriculum materials as free open educational resources under a Creative Commons Attribution license, with the Core Knowledge Curriculum Series having generated nearly 8 million downloaded components since the 2013 release of CKLA. Print editions are sold through an online bookstore containing approximately 953 SKUs at unit prices ranging from $1.95 to $6.95 per activity book, with classroom and grade-level sets available. CKLA K-5 materials are distributed exclusively through publishing partner Amplify. The foundation also generates revenue through fee-based professional learning services, including on-site training and Train-the-Trainer programs for schools implementing the curriculum, and accepts tax-deductible donations.
Core Knowledge primarily serves U.S. public and private K-8 schools and districts, homeschool families, and individual teachers. It has cultivated a community ecosystem including a podcast ("Building Knowledge"), email newsletter, Facebook discussion groups, Pinterest boards, an annual national conference, and a network of "Core Knowledge Schools" and "Leadership Schools." The organization has a small team (11-50 employees) and is governed by a Board of Trustees chaired by founder E.D. Hirsch Jr., with Nonnie Cullipher serving as President & CEO. Recent strategic activity includes a 2025 partnership with Six Red Marbles to develop new visual arts and music curricula, ongoing state-specific curriculum development, and the addition of CK Digital Engagements as a web-based interactive layer for science instruction.
Core Knowledge Foundation firmographics
Firmographics- Name
- Core Knowledge Foundation
- Legal name
- Core Knowledge Foundation
- Website
- https://coreknowledge.org
- Company type
- Private
- Founded year
- 1986
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Core Knowledge Foundation is a 501(c)(3) nonprofit that develops and distributes a comprehensive K-8 curriculum built on its Core Knowledge Sequence, offering most materials as free open educational resources to U.S. schools, homeschool families, and teachers while selling print editions and professional learning services.
- Ownership category
- akta.pro rank
Core Knowledge Foundation industry classification
Industry- Product category
- K-8 Educational Curriculum Publishing
- NAICS
- Educational Services (61), Educational Support Services (61171), Educational Support Services (611710)
- SIC
- Books: Publishing Or Publishing & Printing (2731), Services-Educational Services (8200)
- akta.pro primary industry
- Curriculum, Lesson Planning & Instructional Content Platforms (EDAJAMAD)
- akta.pro secondary industries
- Open Lesson Plans & Teaching Units (K–12) (EDAGAJAI), Core Subject Textbooks (ELA, Math, Science, Social Studies) (EDAGAAAA), K–12 Textbook Publishing (Core Curriculum) (MPAJABAA), K–12 Instructional Design & Curriculum Development Services (EDAGAKAA)
Keywords
Where Core Knowledge Foundation is headquartered
LocationHeadquarters
- HQ city
- Charlottesville
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Core Knowledge Foundation business model
Business model- GTM type
- B2B and B2C
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure, Supply Chain
Revenue model
- Donations: Tax-deductible donations from individuals supporting educational equity. The organization is a 501(c)(3) not-for-profit. Donations fund the creation and free distribution of curriculum materials.
- Curriculum Sales: Sale of print materials through the online bookstore including Student Activity Books ($3.50-$6.95), Classroom Sets, Grade-Level Sets, Homeschool Sets, and Teacher Guides. Over 953 products available. Core Knowledge Language Arts (CKLA) K-5 products sold exclusively through publishing partner Amplify.
- Professional Learning Services: Fee-based professional learning and training services for schools implementing Core Knowledge curriculum, including on-site training by Licensed Professionals and Train-the-Trainer programs.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Pay-as-you-go | Free downloadable curriculum - full access to curriculum materials at no cost |
| Unit Pricing | Pay-as-you-go | Print materials - Student Activity Books and curriculum sets available for purchase |
| Other | Monthly | Donation-supported model - tax-deductible contributions |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels7 records
Core Knowledge Foundation product offering
Product offeringCore offering
Core Knowledge Foundation publishes and distributes a comprehensive K-8 curriculum series built on the Core Knowledge Sequence, covering language arts, history and geography, science, mathematics, visual arts, and music. Most curriculum materials are freely available as open educational resources under Creative Commons licensing, with print editions sold through the Core Knowledge online bookstore and state-specific curricula offered through dedicated partnerships. The foundation also provides fee-based professional learning services and licensed training for schools implementing the curriculum.
Product overview
The Core Knowledge Foundation operates a unified platform called the Core Knowledge Curriculum Series™ — a comprehensive, content-rich K-8 curriculum portfolio consisting of multiple integrated subject modules. The core offerings include: Core Knowledge History & Geography (CKHG) for world and American history; Core Knowledge Language Arts (CKLA) combining Listening & Learning (knowledge-building read-alouds) with Skills Strand (systematic phonics); Core Knowledge Mathematics (CKMath) for math instruction; Core Knowledge Science (CKSci) covering life, physical, and earth sciences; and Core Knowledge The Arts encompassing Music (CKMusic) and Visual Arts (CKVA). Supporting products include the Core Classics® Series of abridged literature, state-specific curricula (Louisiana Bayou Bridges, CK In Your State), digital engagements, and the foundational Core Knowledge Sequence framework document. Most materials are available as free OER downloads, with print editions sold through the bookstore. The CKLA program (PreK-5) is distributed exclusively through publishing partner Amplify.
Differentiator
Problem solved
Functional benefit
Brands
- CKLA: Core Knowledge Language Arts - comprehensive language arts curriculum for students in Preschool through Grade 8
- CKHG
- CKSci
- CKMath
- CKVA
- CKMusic
- Core Classics
- Core Knowledge Sequence
Products and services
- Core Knowledge Language Arts (CKLA) Comprehensive language arts curriculum for Preschool through Grade 8, combining the Listening & Learning strand (knowledge-building read-alouds) with the Skills strand (systematic phonics and decoding instruction).
- Core Knowledge History & Geography (CKHG) K-8 comprehensive program in world and American history and geography, integrating civics and economics topics, with Student Readers, Teacher Guides, Timeline Cards, and Primary Source Activity Books.
- Core Knowledge Science (CKSci) K-8 science curriculum covering life, physical, and earth/space sciences, the human body, and computer science, with K-5 elementary curriculum and an enhanced OpenSciEd middle school program for Grades 6-8.
- Core Knowledge Mathematics (CKMath) K-8 mathematics curriculum based on Illustrative Mathematics and Open Up Resources OER curriculum, emphasizing conceptual understanding and procedural fluency with problem-based learning.
- Core Knowledge Visual Arts (CKVA) K-8 visual arts curriculum focusing on important elements of art, famous artists, works of art, and architectural concepts from around the world, with Student Activity Books and Teacher Guides.
- Core Knowledge Music (CKMusic) K-8 music curriculum exposing students to various musical genres and fundamental elements of music, theory, notation, and music history through Student Activity Books and Teacher Guides.
- Core Classics Series Abridged versions of beloved classic literary works for elementary and middle school readers, supporting and reinforcing knowledge from the CKLA curriculum. Titles include Don Quixote, Frankenstein, Gulliver's Travels, The Iliad and the Odyssey, and others.
- Louisiana Bayou Bridges K-8 social studies curriculum developed in partnership with the Louisiana Department of Education, integrating history, geography, civics, and economics aligned with Louisiana Student Standards for Social Studies.
- Louisiana Foundations of Freedom High school civics curriculum for Louisiana schools, aligned with state standards.
- Land of Liberty: Louisiana High School U.S. History High school U.S. history curriculum for Louisiana schools.
- CK In Your State: History State-specific history units connecting Core Knowledge content with state social studies standards. Currently available for Arizona (Grade 3), Colorado (Grade 4), Minnesota (Grade 6), and North Carolina (Grades 4 & 8).
- Professional Learning Services Fee-based professional learning and training services for schools implementing Core Knowledge curriculum, including on-site training by Licensed Professionals and Train-the-Trainer programs.
Quantifiable outcome
- Nearly 8 million free curriculum components downloaded since 2013
- +1 more outcomes
Companies that use Core Knowledge Foundation
Customer profileNamed customers5 records
Segments4 records
Ideal customer profiles4 records
Core Knowledge Foundation technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Core Knowledge Foundation partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Six Red MarblescoreSix Red Marbles partnered with Core Knowledge Foundation to develop two free K-8 arts curricula: Core Knowledge Visual Arts (CKVA) and Core Knowledge Music (CKMusic). The programs provide hands-on, knowledge-rich arts education aligned with the Core Knowledge approach, guiding students through global art and architecture exploration and diverse musical traditions. Both curricula are available as free downloads with print editions due in Spring 2026. The partnership reflects shared commitment to accessible, high-quality arts education integrating creative practice with historical and analytical understanding.
Scale indicators2 records
Recent moves6 records
Expansion highlights6 records
Core Knowledge Foundation competitors and assessment
Company assessmentBroad incumbents
- Houghton Mifflin Harcourt (HMH): HMH is one of the largest U.S. K–12 publishers, offering comprehensive core curricula in ELA, math, science, and social studies, alongside assessment and professional services. Directly comparable as a broad incumbent in the same procurement cycles.
- McGraw Hill Education: McGraw Hill is a leading K–12 textbook and curriculum publisher across all major subject areas, serving school districts nationally. Comparable as a broad incumbent competing for the same district curriculum adoption dollars Core Knowledge targets.
- Amplify: Amplify is a major K–12 curriculum, assessment, and intervention provider that is simultaneously the exclusive distributor for Core Knowledge's CKLA K–5 product and a direct competitor offering its own ELA and science curricula. The dual role makes Amplify both strategic partner and broad incumbent competitor.
- Imagine Learning: Imagine Learning is a large, diversified K–12 EdTech provider that acquired Open Up Resources and offers curriculum, supplemental programs, and professional learning. Comparable as a scaled OER curriculum incumbent with national reach and bundled services that Core Knowledge cannot match.
Emerging players
- CommonLit: CommonLit is a nonprofit EdTech organization providing free, standards-aligned ELA reading and assessment materials to K–12 teachers. Overlaps with Core Knowledge's literacy and free-distribution missions as a partial-use-case peer.
- Newsela: Newsela is an instructional content platform providing leveled nonfiction articles and real-time knowledge content to K–12 classrooms. Comparable as an emerging player in content-rich ELA/social-studies instructional material, though its delivery is digital-first and topic-current rather than sequence-driven.
Direct peers
- Great Minds: Great Minds is a nonprofit publisher of knowledge-rich, OER K–8 curricula including Wit & Wisdom (ELA), Eureka Math, and PhD Science. It is the most direct head-to-head peer to Core Knowledge: same nonprofit distribution model, same content-rich philosophy, same grade-band focus.
- Open Up Resources: Open Up Resources is a nonprofit that provides free, high-quality K–12 instructional materials (notably the Illustrative Mathematics–based Open Up Math curriculum). Core Knowledge's CKMath is built on Illustrative Mathematics/OER content, making Open Up Resources a direct OER curriculum peer and content dependency.
- EL Education: EL Education publishes a comprehensive, content-rich K–8 ELA and content-area curriculum with an OER model. Like Core Knowledge, it emphasizes coherence, knowledge-building, and equity, making it a near-direct curricular competitor in the same school districts.
Others
- EdReports: EdReports is an independent nonprofit that reviews K–12 instructional materials for alignment and quality, directly influencing the procurement decisions Core Knowledge targets. Included as an ecosystem enabler/adjacent player shaping the competitive landscape.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Core Knowledge Foundation social profiles
Digital presenceCore Knowledge Foundation financial estimates
Financial estimateRevenue estimate
Valuation estimate
Core Knowledge Foundation leadership team
Management profileNumber of profiles
Profiles10 records
Core Knowledge Foundation funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Core Knowledge Foundation M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Core Knowledge Foundation
What does Core Knowledge Foundation do?
Core Knowledge Foundation publishes and distributes a comprehensive K-8 curriculum series built on the Core Knowledge Sequence, covering language arts, history and geography, science, mathematics, visual arts, and music. Most curriculum materials are freely available as open educational resources under Creative Commons licensing, with print editions sold through the Core Knowledge online bookstore and state-specific curricula offered through dedicated partnerships. The foundation also provides fee-based professional learning services and licensed training for schools implementing the curriculum.
Is Core Knowledge Foundation a public or private company?
Core Knowledge Foundation is a private company. It is classified as nonprofit foundation owned and is currently operating.
When was Core Knowledge Foundation founded?
Core Knowledge Foundation was founded in 1986. It employs 11 to 50 people.
Where is Core Knowledge Foundation based?
Core Knowledge Foundation is headquartered in Charlottesville, United States, in the North America region.
How does Core Knowledge Foundation make money?
Three revenue lines are on record. Donations are the primary driver. The others are curriculum Sales and professional Learning Services.
Who are Core Knowledge Foundation's main competitors?
Broad incumbents on record are Houghton Mifflin Harcourt (HMH), McGraw Hill Education, Amplify and Imagine Learning. Emerging players are CommonLit and Newsela. Direct peers are Great Minds, Open Up Resources and EL Education. EdReports is listed as an others.
Does Core Knowledge Foundation have an API?
No public API is recorded for Core Knowledge Foundation.
What industry is Core Knowledge Foundation in?
Core Knowledge Foundation's product category is K-8 Educational Curriculum Publishing. Its primary akta.pro industry code is EDAJAMAD, Curriculum, Lesson Planning & Instructional Content Platforms, with a secondary code of EDAGAJAI, Open Lesson Plans & Teaching Units (K–12). Its NAICS code is 61 and its SIC code is 2731.