{"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.3.OA.D.9","label":"Identify arithmetic patterns and explain them using properties of operations.","public_slug":"3-oa-d-9","route":"/math/standards/us-ccss/3-oa-d-9","data_json_route":"/math/data/standards/us-ccss/3-oa-d-9.json","data_markdown_route":"/math/data/standards/us-ccss/3-oa-d-9.md","skill_count":1,"skill_ids":["oa.input-output.tables"],"crawler_summary":"CCSS.3.OA.D.9 maps to 1 AXIO Math Map skill."},"skills":[{"id":"oa.input-output.tables","title":"Input-output tables","route":"/math/skills/oa/input-output-tables","family_name":"Patterns, Functions, and Generalization"}]}