> ## Documentation Index > Fetch the complete documentation index at: https://docs.learningcommons.org/llms.txt > Use this file to discover all available pages before exploring further. # Crosswalks for a standard > Fetches a list of standards that align to a specific standard through shared learning components. This endpoint retrieves crosswalk relationships bidirectionally: - **State standard → CCSS**: Pass in a state standard to get matching Common Core State Standards (CCSS) - **CCSS → State standards**: Pass in a Common Core State Standards (CCSS) standard to get matching state standards across jurisdictions Each crosswalk includes similarity metrics based on measurable overlap of learning components to help understand the strength and nature of the alignment. Crosswalks provide a scalable way to extend mappings between CCSS and state-specific frameworks without independent matching logic. By leveraging the LC superset, crosswalks show where standards converge in content coverage. Use this endpoint when you need to: - Find Common Core State Standards (CCSS) standards that align to a state standard for content adaptation - Find state standards that align to a Common Core State Standards (CCSS) standard across multiple jurisdictions - Understand the similarity between standards - Map content between Common Core and state frameworks - Analyze the degree of overlap between standards **Note:** Crosswalks are currently available for Mathematics and English Language Arts (ELA) standards in states where LC alignment exists. Math crosswalks cover grades K-12. ELA crosswalks cover grades K-2. Crosswalks are evidence-based (require at least one shared learning component). The endpoint returns paginated results. Use the `limit` and `cursor` parameters to control the number of results returned. **Related topics:** - [Standards crosswalks methodology](/knowledge-graph/schema-reference/standards#understanding-the-jaccard-score) ## OpenAPI ````yaml /api-reference/knowledge-graph-api/openapi.yaml get /academic-standards/{caseIdentifierUUID}/crosswalks openapi: 3.0.3 info: title: Learning Commons Knowledge Graph REST API description: > REST API for accessing education knowledge graph data including academic standards, learning components, and curriculum information. **Key datasets:** - **Academic standards**: Official state standards from all 50 U.S. states sourced from 1EdTech's CASE Network - **Learning components**: Granular, teachable skills that break down broad standards into actionable instructional units - **Standards crosswalks**: Connections between standards and frameworks - **Curriculum**: Structured course content including courses, lesson groupings (units, sections, modules), lessons, activities, and assessments **Learn more:** - [Knowledge Graph Overview](/knowledge-graph/understanding-knowledge-graph/introduction) - [Standards](/knowledge-graph/schema-reference/standards) - [Learning components](/knowledge-graph/schema-reference/learning-components) - [Standards crosswalks](/knowledge-graph/schema-reference/standards) - [Curriculum](/knowledge-graph/schema-reference/curriculum) - [Quickstart](/knowledge-graph/getting-started/quickstart) version: '0' servers: - url: https://api.learningcommons.org/knowledge-graph/v0 description: Production server security: - ApiKeyAuth: [] tags: - name: Academic standards description: Academic standards operations - name: Curriculum description: Curriculum operations - name: Durable skills description: Durable skills frameworks and skills operations - name: Hierarchy description: Hierarchical navigation operations - name: Learning components description: Learning components operations - name: Learning progressions description: Learning progressions operations - name: Search description: Search and discovery operations - name: Standards crosswalks description: Standards crosswalks operations paths: /academic-standards/{caseIdentifierUUID}/crosswalks: get: tags: - Standards crosswalks - Academic standards summary: Crosswalks for a standard description: > Fetches a list of standards that align to a specific standard through shared learning components. This endpoint retrieves crosswalk relationships bidirectionally: - **State standard → CCSS**: Pass in a state standard to get matching Common Core State Standards (CCSS) - **CCSS → State standards**: Pass in a Common Core State Standards (CCSS) standard to get matching state standards across jurisdictions Each crosswalk includes similarity metrics based on measurable overlap of learning components to help understand the strength and nature of the alignment. Crosswalks provide a scalable way to extend mappings between CCSS and state-specific frameworks without independent matching logic. By leveraging the LC superset, crosswalks show where standards converge in content coverage. Use this endpoint when you need to: - Find Common Core State Standards (CCSS) standards that align to a state standard for content adaptation - Find state standards that align to a Common Core State Standards (CCSS) standard across multiple jurisdictions - Understand the similarity between standards - Map content between Common Core and state frameworks - Analyze the degree of overlap between standards **Note:** Crosswalks are currently available for Mathematics and English Language Arts (ELA) standards in states where LC alignment exists. Math crosswalks cover grades K-12. ELA crosswalks cover grades K-2. Crosswalks are evidence-based (require at least one shared learning component). The endpoint returns paginated results. Use the `limit` and `cursor` parameters to control the number of results returned. **Related topics:** - [Standards crosswalks methodology](/knowledge-graph/schema-reference/standards#understanding-the-jaccard-score) operationId: listCrosswalkedStandards parameters: - $ref: '#/components/parameters/CaseIdentifierUUIDPath' - $ref: '#/components/parameters/JurisdictionParam' - name: minJaccardScore in: query required: false description: Minimum Jaccard score when focusing on stronger alignments schema: type: number format: float minimum: 0 maximum: 1 - $ref: '#/components/parameters/LimitParam' - $ref: '#/components/parameters/CursorParam' responses: '200': description: >- Successfully retrieved list of Common Core State Standards (CCSS) standards if a state standard was provided, or a list of state standards if a CCSS standard was provided content: application/json: schema: allOf: - $ref: '#/components/schemas/PaginatedResponse' - type: object properties: data: type: array items: $ref: '#/components/schemas/StandardCrosswalk' examples: stateToCommonCore: summary: >- State standard to Common Core State Standards (CCSS) standards (returns CCSS standards) value: data: - caseIdentifierUUID: 0bb530f0-4b99-11ec-a64d-0242ac1a0003 statementCode: 6.NS.B.4 description: >- Use prime factorization to find the greatest common factor of two whole numbers less than or equal to 100 and the least common multiple of two whole numbers less than or equal to 12. Use the distributive property to express a sum of two whole numbers 1–100 with a common factor as a multiple of a sum of two relatively prime numbers. For example, express 36 + 8 as 4(9 + 2). jurisdiction: Rhode Island jaccard: 1 stateLCCount: 3 ccssLCCount: 3 sharedLCCount: 3 author: Rhode Island Department of Education provider: Learning Commons license: https://creativecommons.org/licenses/by/4.0/ attributionStatement: >- Knowledge Graph is provided by Learning Commons under the CC BY-4.0 license. Rhode Island Mathematics standards provided by Rhode Island Department of Education available at https://ride.ri.gov/sites/g/files/xkgbur806/files/Portals/0/Uploads/Documents/Instruction-and-Assessment-World-Class-Standards/Standards/Rhode-Island-Core-Standards-V2-4.9.21.pdf?ver=2021-04-21-154246-580. - caseIdentifierUUID: 16674743-eb8f-11e9-9f9f-0242ac140002 statementCode: 6.NS.B.4 description: >- Find the greatest common factor of two whole numbers less than or equal to 100 and the least common multiple of two whole numbers less than or equal to 12. Use the distributive property to express a sum of two whole numbers 1–100 with a common factor as a multiple of a sum of two whole numbers with no common factor. *For example, express 36 + 8 as 4(9 + 2).* jurisdiction: Colorado jaccard: 1 stateLCCount: 3 ccssLCCount: 3 sharedLCCount: 3 author: Colorado Department of Education provider: Learning Commons license: https://creativecommons.org/licenses/by/4.0/ attributionStatement: >- Knowledge Graph is provided by Learning Commons under the CC BY-4.0 license. Colorado Mathematics standards provided by Colorado Department of Education available at https://www.cde.state.co.us/comath/statestandards. pagination: limit: 100 nextCursor: null hasMore: false commonCoreToState: summary: >- Common Core State Standards (CCSS) standards to state standards (returns state standards) value: data: - caseIdentifierUUID: 7cd13b29-605b-3c35-8b10-082008a56b05 statementCode: 3.NF.A.1 description: >- Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts jurisdiction: Iowa jaccard: 0.95 stateLCCount: 7 ccssLCCount: 7 sharedLCCount: 7 - caseIdentifierUUID: 8de24c3a-716c-4d46-9c21-193119b67c16 statementCode: MA.3.NF.1 description: >- Understand a fraction 1/b as the quantity formed by 1 part when a whole is partitioned into b equal parts jurisdiction: Massachusetts jaccard: 0.92 stateLCCount: 8 ccssLCCount: 7 sharedLCCount: 7 pagination: limit: 100 nextCursor: >- eyJpZGVudGlmaWVyIjoiOGRlMjRjM2EtNzE2Yy00ZDQ2LTljMjEtMTkzMTE5YjY3YzE2In0= hasMore: true '400': description: Bad request - Invalid CASE Network UUID or filter parameters content: application/json: schema: $ref: '#/components/schemas/Error' example: error: ValidationError message: Invalid minJaccardScore. Must be a number between 0.0 and 1.0. requestId: req_12345 '404': description: Academic standard not found content: application/json: schema: $ref: '#/components/schemas/Error' example: error: NotFoundError message: >- Academic standard with CASE Network UUID "6bd8552e-6f8f-4538-bf33-d016ac080178" not found. Verify the UUID is correct. requestId: req_12345 '422': description: >- Unprocessable Entity - Invalid parameter values (e.g., enum value not in allowed list) content: application/json: schema: $ref: '#/components/schemas/Error' example: error: ValidationError message: Input should be 'Alabama', 'Alaska', ..., or 'Multi-State' requestId: req_12345 '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/Error' example: error: InternalServerError message: >- An unexpected error occurred while retrieving crosswalked standards requestId: req_12345 components: parameters: CaseIdentifierUUIDPath: name: caseIdentifierUUID in: path required: true description: CASE Network UUID for the resource schema: type: string format: uuid JurisdictionParam: name: jurisdiction in: query required: false schema: $ref: '#/components/schemas/JurisdictionENUM' LimitParam: name: limit in: query required: false description: Maximum number of results to return schema: type: integer minimum: 1 maximum: 1000 default: 100 CursorParam: name: cursor in: query required: false description: >- Pagination cursor obtained from the `nextCursor` field in a previous response (not needed for the first page) schema: type: string schemas: PaginatedResponse: type: object description: Cursor-based paginated response required: - data - pagination properties: data: type: array description: Array of result items items: type: object pagination: $ref: '#/components/schemas/Pagination' StandardCrosswalk: type: object description: > Represents a crosswalk relationship between two standards, including similarity metrics based on shared learning components. Crosswalks connect mathematics standards bidirectionally based on measurable overlap of learning components: - **State → CCSS**: When querying with a state standard, this represents an aligned CCSS standard - **CCSS → State**: When querying with a CCSS standard, this represents an aligned state standard Each crosswalk includes quantitative measures that help understand the strength and nature of the alignment. The Jaccard similarity score measures the proportion of shared learning components between the two standards, with scores ranging from 0 (no overlap) to 1 (complete overlap). Higher scores indicate stronger similarity in content coverage. required: - caseIdentifierUUID - author - provider - license - attributionStatement properties: caseIdentifierUUID: type: string format: uuid description: CASE Network UUID for the resource statementCode: type: string nullable: true description: >- Code that identifies a standard within its standards framework (e.g., "3.NF.A.1", "A.1B", "MP1"); `null` for organizational groupings without assigned codes description: type: string nullable: true description: >- Full text of the standard describing what students should know or be able to do jurisdiction: $ref: '#/components/schemas/JurisdictionENUM' type: string nullable: true jaccard: type: number format: float description: >- Jaccard score representing the proportion of shared components between a state and Common Core State Standards (CCSS) standard; calculated as `sharedLCCount / (stateLCCount + ccssLCCount - sharedLCCount)` minimum: 0 maximum: 1 stateLCCount: type: integer description: Number of components supporting the state standard minimum: 0 ccssLCCount: type: integer description: >- Number of components supporting the Common Core State Standards (CCSS) standard minimum: 0 sharedLCCount: type: integer description: >- Number of components supporting both the state and Common Core State Standards (CCSS) standards minimum: 1 author: type: string description: Author or creator of the resource provider: type: string description: Source data provider for the resource license: type: string format: uri description: URL to the resource's license document attributionStatement: type: string description: >- Statement that acknowledges the resource's author and provider, as required by the CC BY 4.0 license Error: type: object description: Standard error response object returned for all error conditions required: - error - message - requestId properties: error: type: string description: >- Machine-readable error type identifier (e.g., `ValidationError`, `NotFoundError`, `InternalServerError`) message: type: string description: >- Human-readable error message that explains what went wrong and may include actionable guidance requestId: type: string description: Unique identifier for this request (for debugging and support) details: type: object description: >- Optional additional details about the error, such as validation failures or field-specific issues additionalProperties: true JurisdictionENUM: type: string description: U.S. state, territory, or multi-state designation enum: - Alabama - Alaska - Arizona - Arkansas - California - Colorado - Connecticut - Delaware - Florida - Georgia - Hawaii - Idaho - Illinois - Indiana - Iowa - Kansas - Kentucky - Louisiana - Maine - Maryland - Massachusetts - Michigan - Minnesota - Mississippi - Missouri - Montana - Nebraska - Nevada - New Hampshire - New Jersey - New Mexico - New York - North Carolina - North Dakota - Ohio - Oklahoma - Oregon - Pennsylvania - Rhode Island - South Carolina - South Dakota - Tennessee - Texas - Utah - Vermont - Virginia - Washington - Washington, D.C. - West Virginia - Wisconsin - Wyoming - Multi-State Pagination: type: object description: Cursor-based pagination metadata required: - limit - hasMore properties: limit: type: integer description: Maximum number of results to return per page nextCursor: type: string nullable: true description: >- Cursor for fetching the next page of results in your next request (`null` if there are no more results) hasMore: type: boolean description: Whether there are more results after this page securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-api-key description: API key for authentication ````