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About

Standards Crosswalks connect state mathematics standards to their closest matching Common Core State Standards (CCSSM) based on measurable overlap of Learning Components. Crosswalks provide developers and content providers with a scalable way to extend mappings from CCSSM to state-specific frameworks without having to independently replicate matching logic. By leveraging the LC superset, crosswalks show where state and CCSSM standards converge in content coverage. This data can be used to more easily adapt content aligned to CCSSM for use in specific jurisdictions

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Key characteristics

  • Evidence-based mapping: Crosswalks are built only when standards share at least one LC.
  • Similarity measurement: Each relationship includes a jaccard similarity score and supporting counts of LCs.
  • Directionality: Crosswalks always connect from a state standard → CCSSM standard and not between states.
  • Scope: Limited to math standards in states where LC alignment exists.
This design ensures that crosswalks are transparent, consistent, and extensible as additional states’ Learning Components alignments are completed.

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Data relationship diagram

Diagram: state mathematics standards linked to Common Core standards via hasStandardAlignment, with Jaccard similarity and shared Learning Components
The diagram shows the Standards Crosswalks dataset only: state mathematics standards mapped to Common Core State Standards. Both endpoints are StandardsFrameworkItem (defined in Academic Standards). Direction is always state → CCSS, not between states. Edge properties include jaccard and LC counts; see Relationship properties below.Example (New York → CCSS): A state standard is a StandardsFrameworkItem from a state framework—e.g. NY 3.NF.1 (Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts). A CCSS standard is a StandardsFrameworkItem from Common Core Math—e.g. 3.NF.A.1. A hasStandardAlignment edge connects them when they share at least one Learning Component; the edge has properties such as jaccard (e.g. 0.85), stateLCCount, ccssLCCount, sharedLCCount. So: NY 3.NF.1 -[:hasStandardAlignment]-> 3.NF.A.1. Crosswalks are only state → CCSS (never state → state).Edge list (source → relationship → target):
  • StandardsFrameworkItem (state) → hasStandardAlignment → StandardsFrameworkItem (CCSS) (e.g. NY 3.NF.1 → 3.NF.A.1)

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Relationships

Each crosswalk is represented as a directional relationship: (State standard) -[:hasStandardAlignment]-> (CCSS standard).

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Relationship properties

The relationship includes quantitative measures of similarity:
PropertyDescription
jaccardProportion of shared LCs between state and CCSS standards (0 < jaccard ≤ 1).
stateLCCountNumber of Learning Components supporting the state standard.
ccssLCCountNumber of Learning Components supporting the CCSS standard.
sharedLCCountNumber of Learning Components shared by both standards.
Only standards with at least one shared Learning Component are included. Every hasStandardAlignment edge represents an evidence-based connection.
The Jaccard index measures similarity between two sets — here, the sets of Learning Components that support each standard.Jaccard = Shared Learning Components ÷ (State Learning Components + CCSS Learning Components − Shared Learning Components)
  • Score of 1.0 – Standards share all of their Learning Components
  • Score of 0.0 – Standards share none of their Learning Components
  • Scores between 0 and 1 – Standards have partial overlap, with higher values representing stronger similarity.
    Example: If a state standard has 5 Learning Components, a CCSSM standard has 6, and they share 4 of them, their Jaccard index would be calculated as follows:Jaccard = 4/(5+6−4) = 0.57i.e., about 57% of these standards’ underlying skills overlap
The StandardsFrameworkItem entity is defined in Academic Standards.

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hasStandardAlignment

A hasStandardAlignment connects a State Standard StandardsFrameworkItem to a CCSS Standard StandardsFrameworkItem when the two share overlapping Learning Components. (:StandardsFrameworkItem) -[:hasStandardAlignment]-> (:StandardsFrameworkItem)
example.json
{
  "type": "relationship",
  "identifier": "3edc451c-392b-50ad-addd-d6b76ab7ab49",
  "label": "hasStandardAlignment",
  "properties": {
    "dateCreated": "2026-01-02",
    "license": "https://creativecommons.org/licenses/by/4.0/",
    "targetEntity": "StandardsFrameworkItem",
    "attributionStatement": "Knowledge Graph is provided by Learning Commons under the CC BY-4.0 license.",
    "description": "A hasStandardAlignment relationship connects a State standard to a CCSS standard when the two are supported by overlapping sets of Learning Components. The relationship indicates an evidence-based crosswalk derived from measurable overlap of deconstructed skills, expressed through properties such as jaccard and LC counts. It does not imply sequence, dependency, or pedagogical progression, only the degree of shared content between the two standards.",
    "dateModified": "2026-01-02",
    "identifier": "3edc451c-392b-50ad-addd-d6b76ab7ab49",
    "stateLCCount": "2",
    "provider": "Learning Commons",
    "sourceEntity": "StandardsFrameworkItem",
    "sharedLCCount": "2",
    "sourceEntityKey": "caseIdentifierUUID",
    "ccssLCCount": "2",
    "author": "Learning Commons",
    "jaccard": "1.0",
    "targetEntityKey": "caseIdentifierUUID",
    "relationshipType": "hasStandardAlignment"
  },
  "source_identifier": "20d6435a-4b7f-53b7-abcc-cb61dcd36679",
  "source_labels": ["StandardsFrameworkItem"],
  "target_identifier": "74721dc3-d49c-5f16-804c-4cb07fca6ed6",
  "target_labels": ["StandardsFrameworkItem"]
}