State

Montana

Standards set by Montana Office of Public Instruction (OPI) · official standards page

Common Core position

MathematicsAdapted / renamedELAAdapted / renamed

MT adopted CCSS-based standards for ELA and math in Nov 2011. Math has since been revised: the '2026 Montana Mathematics Content Standards' (adopted ~Jan 2025) took effect July 1, 2026, and retains a K-12 CCSS-correspondence appendix (confirmed via OPI's K-12 Content Standards page, which lists Mathematics Cycle II as adopted January 2025 / implementation July 1, 2026), so still coded ccss-adapted. ELA remains the original 2011 CCSS-based document; OPI's K-12 Content Standards page (verified live) shows ELA Cycle IV with adoption September 2025 and implementation July 1, 2027, confirming the 2011 ELA document is still the one in force today. Science, Social Studies, and several other subjects are listed on that same page as 'TBD' for revision timeline as of July 2025, confirming no active revision is underway for social studies.