{"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.1.NBT.C.4","label":"addition, place value, within 100; calculate, model, explain.","public_slug":"curratom-us-ccss-1-nbt-c-4","route":"/math/standards/us-ccss/curratom-us-ccss-1-nbt-c-4","data_json_route":"/math/data/standards/us-ccss/curratom-us-ccss-1-nbt-c-4.json","data_markdown_route":"/math/data/standards/us-ccss/curratom-us-ccss-1-nbt-c-4.md","skill_count":4,"skills":[{"title":"Add Two Digit No Regroup","route":"/math/skills/nbt/add-two-digit-no-regroup","family_name":"Whole-Number Operations and Fact Fluency","standards":[]},{"title":"Add Two Digit Regroup","route":"/math/skills/nbt/add-two-digit-regroup","family_name":"Whole-Number Operations and Fact Fluency","standards":[]},{"title":"Place Value Tens Ones","route":"/math/skills/nbt/place-value-tens-ones","family_name":"Base-Ten Place Value and Whole-Number Notation","standards":[]},{"title":"Sub Two Digit Regroup","route":"/math/skills/nbt/sub-two-digit-regroup","family_name":"Whole-Number Operations and Fact Fluency","standards":[]}],"crawler_summary":"CCSS.1.NBT.C.4 maps to 4 math skills."}}