The EdGate Concept Index is our patented taxonomy of educational concepts built from K–12 standards. It is the core framework behind ExACT and the foundation for our alignment and crosswalk services. Refined over years of work with educators, publishers, and technology providers, the Concept Index makes it possible to connect any piece of content to the right standards in just one step.
The Concept Index is a list of standards-based educational concepts organized by subject area. Each concept reflects knowledge or skills taught in K–12 standards. By tagging content with a concept from the Index, ExACT automatically aligns that content to every applicable standard containing the same concept.
For example, if a video lesson is tagged with “fractions,” it will be linked to all standards in our repository that include that concept. The process includes a built-in review step so authorized team members can confirm the alignment before it goes live.
The Concept Index allows EdGate to deliver fast, accurate standards alignments and crosswalks at scale. Publishers, edtech providers, and curriculum developers can align once to a concept, and we can map those alignments to any other standard set. That means you can take a resource aligned to Common Core and quickly crosswalk it to Texas TEKS, Florida B.E.S.T., or any other standard in our repository without starting over.
The Concept Index is available for licensing by subject, complete with all associated standards. Our core subject packages include Language Arts, Math, Science, and Social Studies, each with 1,500 top concepts covering approximately 90 percent of standards. Additional subjects are available upon request.
Contact us to explore licensing packages that fit your needs.
We also create custom taxonomies for any subject, grade range, or educational goal. This service is ideal for publishers who need to organize content, build a hierarchy, or align by concept in specialized areas. For example, we have created taxonomies for Microsoft Office applications and computer concepts, aligning them to Microsoft Office Specialist (MOS) and IC3 certification outcomes for our higher education and professional clients.
Beyond taxonomy creation, EdGate develops learning progressions — sequenced expectations showing how skills and knowledge build over time. These are aligned by subject area and grounded in standards, helping educators see the vertical progression of skills, identify gaps, and plan targeted interventions.
Our proprietary tools can:
The Concept Index is more than just a list. It is the connective system that makes accurate, scalable standards alignment possible. Whether you are licensing our taxonomy, creating a custom one, or using it to build learning progressions, the Concept Index gives you the precision and reach you need.