> ## 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. # Prerequisites for a standard > Fetches the prerequisite StandardsFrameworkItems for the specified academic standard - the foundational standards it builds **from** via the "buildsTowards" relationship. These are the foundational skills or concepts that contribute to mastery of the given academic standard (each prerequisite `buildsTowards` the given standard). The relationship is directional but does not require strict prerequisite order - students don't need to fully master prerequisites before engaging with the given academic standard. Use this endpoint when you need to: - Identify foundational academic standards students should be familiar with before tackling a target academic standard - Trace backward through a learning progression to understand dependencies - Design remediation or review activities based on prerequisite skills - Map out a coherent learning pathway for students **Note:** Learning progression data is currently based on Student Achievement Partners' Coherence Map for Common Core State Standards (CCSS) for Mathematics. Coverage for other subjects and frameworks may be limited. The endpoint returns paginated results. Use the `limit` and `cursor` parameters to control the number of results returned. **Related topics:** - [Understanding the buildsTowards relationship](/knowledge-graph/schema-reference/learning-progressions#buildstowards) ## OpenAPI ````yaml /api-reference/knowledge-graph-api/openapi.yaml get /academic-standards/{caseIdentifierUUID}/prerequisites 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 US 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}/prerequisites: get: tags: - Academic Standards - Learning Progressions summary: Prerequisites for a standard description: > Fetches the prerequisite StandardsFrameworkItems for the specified academic standard - the foundational standards it builds **from** via the "buildsTowards" relationship. These are the foundational skills or concepts that contribute to mastery of the given academic standard (each prerequisite `buildsTowards` the given standard). The relationship is directional but does not require strict prerequisite order - students don't need to fully master prerequisites before engaging with the given academic standard. Use this endpoint when you need to: - Identify foundational academic standards students should be familiar with before tackling a target academic standard - Trace backward through a learning progression to understand dependencies - Design remediation or review activities based on prerequisite skills - Map out a coherent learning pathway for students **Note:** Learning progression data is currently based on Student Achievement Partners' Coherence Map for Common Core State Standards (CCSS) for Mathematics. Coverage for other subjects and frameworks may be limited. The endpoint returns paginated results. Use the `limit` and `cursor` parameters to control the number of results returned. **Related topics:** - [Understanding the buildsTowards relationship](/knowledge-graph/schema-reference/learning-progressions#buildstowards) operationId: listPrerequisiteAcademicStandards parameters: - $ref: '#/components/parameters/CaseIdentifierUUIDPath' - $ref: '#/components/parameters/LimitParam' - $ref: '#/components/parameters/CursorParam' responses: '200': description: Successfully retrieved list of prerequisite standards content: application/json: schema: allOf: - $ref: '#/components/schemas/PaginatedResponse' - type: object properties: data: type: array items: $ref: '#/components/schemas/StandardsFrameworkItemSummary' example: data: - caseIdentifierUUID: 6b9ee241-d7cc-11e8-824f-0242ac160002 statementCode: 5.OA.A.2 description: >- Write simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating them. *For example, express the calculation "add 8 and 7, then multiply by 2" as $2 \times (8 + 7)$. Recognize that $3 \times (18932 + 921)$ is three times as large as 18932 + 921, without having to calculate the indicated sum or product.* author: 1EdTech 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. Learning Commons received state standards and written permission under CC BY-4.0 from 1EdTech. - caseIdentifierUUID: 6b9ed00e-d7cc-11e8-824f-0242ac160002 statementCode: 4.OA.B.4 description: >- Find all factor pairs for a whole number in the range 1—100. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number in the range 1—100 is a multiple of a given one-digit number. Determine whether a given whole number in the range 1—100 is prime or composite. author: 1EdTech 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. Learning Commons received state standards and written permission under CC BY-4.0 from 1EdTech. pagination: limit: 100 nextCursor: null hasMore: false '400': description: Bad request - Invalid CASE Network UUID or pagination parameters content: application/json: schema: $ref: '#/components/schemas/Error' example: error: ValidationError message: >- Invalid CASE Network UUID format. Must be a valid UUID (e.g., "6bd8552e-6f8f-4538-bf33-d016ac080178"). 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 '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/Error' example: error: InternalServerError message: >- An unexpected error occurred while retrieving prerequisite 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 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' StandardsFrameworkItemSummary: type: object description: > Lightweight representation of a StandardsFrameworkItem containing only essential identifying information. Used in relationship endpoints (learning progressions, related standards) to keep responses fast and enable efficient graph traversal. To retrieve full details for a standard, use the GET /standards/{caseIdentifierUUID} endpoint. 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' 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 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 JurisdictionENUM: type: string description: US 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 securitySchemes: ApiKeyAuth: type: apiKey in: header name: x-api-key description: API key for authentication ````