{"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.NBT.B.9","label":"place value reasoning, operation properties, strategy explanation; explain, justify.","public_slug":"curratom-us-ccss-2-nbt-b-9","route":"/math/standards/us-ccss/curratom-us-ccss-2-nbt-b-9","data_json_route":"/math/data/standards/us-ccss/curratom-us-ccss-2-nbt-b-9.json","data_markdown_route":"/math/data/standards/us-ccss/curratom-us-ccss-2-nbt-b-9.md","skill_count":1,"skills":[{"title":"Operations Properties Apply","route":"/math/skills/oa/operations-properties-apply","family_name":"Equations, Variables, Expressions, and Inequalities","standards":[]}],"crawler_summary":"CCSS.2.NBT.B.9 maps to 1 math skill."}}