{"system":{"system_id":"us_ccss","public_slug":"us-ccss","label":"US Common Core Math","official_source_urls":["https://thecorestandards.org/Math/","https://thecorestandards.org/standards-in-your-state/"]},"standard":{"system_id":"us_ccss","system_slug":"us-ccss","system_label":"US Common Core Math","code":"CCSS.2.OA.B.2","label":"addition facts, subtraction facts, mental strategies; calculate, fluently compute.","public_slug":"curratom-us-ccss-2-oa-b-2","route":"/math/standards/us-ccss/curratom-us-ccss-2-oa-b-2","data_json_route":"/math/data/standards/us-ccss/curratom-us-ccss-2-oa-b-2.json","data_markdown_route":"/math/data/standards/us-ccss/curratom-us-ccss-2-oa-b-2.md","skill_count":2,"skills":[{"title":"Add Within 20 Strategies","route":"/math/skills/oa/add-within-20-strategies","family_name":"Whole-Number Operations and Fact Fluency","standards":[]},{"title":"Sub Within 20 Strategies","route":"/math/skills/oa/sub-within-20-strategies","family_name":"Whole-Number Operations and Fact Fluency","standards":[]}],"crawler_summary":"CCSS.2.OA.B.2 maps to 2 math skills."}}