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Image provided by MTC of Northern Colorado — Greeley, Co

Active Math Teachers’ Circle
Formerly active Math Teachers’ Circle
Math Teachers’ Circle coming soon…

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Alabama
- Mobile: Mobile Math Teachers’ Circle

Arizona
- Sierra Vista: CirculoSoAZ – Borderlands Math Teachers’ Circle
- Tsaile: Navajo Nation Math Teachers’ Circle
- Tucson: Tucson Math Teachers’ Circle

California
- Atascadero: North San Luis Obispo County Math Teachers’ Circle
- Hayward/Lafayette: East Bay Math Teachers’ Circle
- Carson: CSU Dominguez Hills Math Teachers’ Circle
- Hollister: Hollister Math Teachers’ Circle
- Hollister: San Benito County Math Talks
- Los Angeles: University of Southern California Math Teachers’ Circle
- Merced: Merced Math Teachers’ Circle
- Monterey: CSU Monterey Bay Math Teachers’ Circle
- Morgan Hill: Morgan Hill Math Teachers’ Circle
- Palo Alto: AIM Math Teachers’ Circle – Stanford
- San Bernardino: Inland Empire Math Teachers’ Circle
- San Diego: San Diego Math Teachers’ Circle
- San Francisco: San Francisco Math Teachers’ Circle
- San Jose: AIM Math Teachers’ Circle – San Jose
- Santa Cruz: Santa Cruz Math Teachers’ Circle
- Stockton: San Joaquin County Math Teachers’ Circle
- Sonoma: Wine Country Math Teachers’ Circle
- Thousand Oaks: Thousand Oaks Math Teachers’ Circle

Colorado
- Colorado Springs: Pikes Peak Math Teachers’ Circle
- Denver/Longmont: Rocky Mountain Math Teachers’ Circle
- Durango: Southwest Colorado Math Teachers’ Circle
- Greeley: Math Teachers’ Circle of Northern Colorado
- Roaring Fork Valley: Roaring Fork Chapter of the Rocky Mountain MTC

Connecticut
- Fairfield: Fairfield County Math Teachers’ Circle
- Hartford: Math Teachers’ Circle 4 Justice
- New Haven: New Haven County Math Teachers’ Circle

Florida
- Boca Raton: Gold Coast Math Teachers’ Circle
- Fort Meyers: Southwest Florida Math Teachers’ Circle

Georgia
- Atlanta: Intown Atlanta Math Teachers’ Circle
- Kennesaw/Atlanta: Metro Atlanta Math Teachers’ Circle
- Savannah: Savannah Math Teachers’ Circle

Hawai’i
- Honolulu, O’ahu: Math Teachers’ Circle of Hawai’i (MaTCH)
- Kapolei, O’ahu: West O’ahu Math Teachers’ Circle

Idaho
- Boise: Boise Math Teachers’ Circle
Illinois
- Chicago: Chicago Math Teachers’ Circle
- Edwardsville: Great Rivers Math Teachers’ Circle
- Romeoville: Southwest Chicago Math Teachers’ Circle

Iowa
- Ames: Central Iowa Middle School Math Teachers’ Circle
- Des Moines: Iowa Heartland Math Teachers’ Circle
- Dubuque: Dubuque Math Teachers’ Circle
- Sioux Center: Northwest Iowa Math Teachers’ Circle

Kansas
- Olathe: Heartland Math Teachers’ Circle
- Lawrence (Northeast Kansas): Jayhawk Math Teachers’ Circle
- Salina: Central Kansas Math Teachers’ Circle

Kentucky
- Fort Thomas: Northern Kentucky Math Teachers’ Circle
- Murray: West Kentucky Math Teachers’ Circle
- Richmond: Eastern Kentucky Math Teachers’ Circle

Louisiana
- Lafayette: Acadiana Math Teachers’ Circle
- Shreveport: North Louisiana Math Teachers’ Circle
- New Orleans: New Orleans Math Teachers’ Circle

Maine
- Falmouth/Portland: Casco Bay Math Teachers’ Circle

Maryland
- Annapolis: Annapolis Math Teachers’ Circle

Massachusetts
- Cambridge: Boston Math Teachers’ Circle (for middle school teachers)
- Chestnut Hill: Math Teachers’ Circle at Boston College (for high school teachers and pre-service teachers)
- Lowell: Merrimack Valley Math Teahers’ Circle

Michigan
- Detroit: Wayne County Math Teachers’ Circle
- Marquette: Central Upper Peninsula Math Teachers’ Circle
- Sault Ste. Marie: Eastern Upper Peninsula Math Teachers’ Circle

Minnesota
- Minneapolis/St. Paul: Twin Cities Math Teachers’ Circle
- St. Cloud: Central Minnesota Math Teachers’ Circle
- St. Paul: St. Paul Elementary Math Teachers’ Circle

Mississippi
- Cleveland: Mississippi Delta Math Teachers’ Circle
- Gulfport: South Mississippi Math Teachers’ Circle
- Jackson: Capital City Circle

Montana

Note: For more information about Montana’s statewide network of MTCs, please visit the Montana Math Teachers’ Circle Network or contact Ke Wu, University of Montana, at ke.wu (at) mso . umt . edu.

- Billings: Montana Math Teachers’ Circle at Billings
- Great Falls: Great Falls Math Teachers’ Circle
- Helena: Helena Math Teachers’ Circle
- Missoula: Montana Math Teachers’ Circle at Missoula
- Polson: Mission Valley Math Teachers’ Circle

Nebraska

Note: For more information about Nebraska’s statewide network of MTCs, please visit the Greater Nebraska Math Teachers Circle or contact Michelle Homp, University of Nebraska-Lincoln, mhomp3 (at) math . unl . edu.

- Beatrice
- Bellevue
- Columbus
- Falls City
- Fremont
- Grand Island
- Hastings
- Holdrege
- Kearney: Central Nebraska Math Teachers’ Circle
- Lincoln: Lincoln Area Math Teachers’ Circle
- Milford
- Norfolk
- North Platte
- Omaha: Omaha Area Math Teachers’ Circle
- Seward
- Scottsbluff
- Superior
- Wayne: Northeast Nebraska Math Teachers Circle

New Hampshire
- Plymouth: New Hampshire Math Teachers’ Circle

New Jersey
- New Brunswick: Rutgers Math Teachers’ Circle
- Toms River: Rutgers Math Teachers’ Circle at Toms River

New Mexico

Note: For more information about New Mexico’s statewide network of MTCs, please visit the Math Circles Collaborative of New Mexico, or contact James Taylor at jtaylor (at) mathcirclesnm . org.

- - Albuquerque: Albuquerque Math Teachers’ Circle
  - Española: Math Teachers’ Circle of Northern New Mexico
  - Santa Fe: MathAmigos

New York
- Buffalo: Buffalo Math Teachers’ Circle
- Annandale-on-Hudson (Bard College): Mid-Hudson Math Teachers’ Circle
- Brooklyn: Math Teachers’ Circle @ CityTech
- Ithaca: Ithaca Math Teachers’ Circle
- New York City: New York Math Circle
- New York City: NYC Community of Adult Math Instructors
- New York City: Roundtable: the MoMath Math Teachers’ Circle
- Rochester: Rochester Math Teachers’ Circle
- Stony Brook: Math Teachers’ Circle @Stony Brook

North Carolina

Note: For more information about North Carolina’s statewide network of MTCs, please visit the North Carolina Network of Math Teachers’ Circles, or contact Nathan Borchelt, Western Carolina University, at naborchelt (at) email . wcu . edu or Sloan Despeaux, Western Carolina University, at despeaux (at) email . wcu . edu.

- Asheville: Blue Ridge Math Teachers’ Circle
- Boone: High Country Math Teachers’ Circle
- Chapel Hill: Triangle Math Teachers’ Circle
- Charlotte: Charlotte Math Teachers’ Circle
- Cullowhee: Smoky Mountain Math Teachers’ Circle
- Fayetteville: Sandhills Math Teachers’ Circle
- Greenville: East Carolina Math Teachers’ Circle
- High Point: Triad Math Teachers’ Circle
- Salisbury: Central North Carolina Math Teachers’ Circle
- Wilmington: Wilmington Math Teachers’ Circle
- Winston-Salem: Winston-Salem Math Teachers’ Circle

North Dakota
- Fargo: Math Teachers’ Circle of North Dakota

Ohio

Note: For more information about Ohio’s statewide network of MTCs, please contact Bob Klein, Ohio University, kleinr (at) ohio . edu.

- Akron: Rubber City Math Teachers’ Circle
- Athens: South East Ohio Math Teachers’ Circle
- Bowling Green: Black Swamp Math Teachers’ Circle
- Cincinnati: Cincy Math Circle
- Cleveland: Crooked River Math Teachers’ Circle
- Columbus: Columbus Math Circle
- Dayton: Dayton Area Math Teachers’ Circle
- Toledo: Glass City Math Teachers’ Circle
- Youngstown-Warren: Mahoning Valley Math Teachers Circle

Oklahoma

Note: For more information about Oklahoma’s statewide network of MTCs, please contact Christine Koerner, Oklahoma Department of Education, christine . koerner (at) sde . ok . gov.

- Ada: Southeast Oklahoma Math Teachers’ Circle
- Edmond: Central Oklahoma Math Teachers’ Circle
- Muskogee Area: Northeastern Oklahoma Math Teachers’ Circle
- Oklahoma City: Oklahoma Math Teachers’ Circle Network
- Stillwater: Northern Oklahoma Math Teachers’ Circle
- Tulsa: Tulsa Math Teachers’ Circle

Oregon

- Eugene: Lane Ignite Math Teachers’ Circle
- Portland: Portland Math Teachers’ Circle

Pennsylvania
- Huntingdon: Math Teachers at the Center of PA
- Philadelphia: Philadelphia Area Math Teachers’ Circle
- Villanova: West Philadelphia Area Math Teachers’ Circle

South Carolina
- Columbia: South Carolina High Energy Math Teachers’ Circle
- Conway: Coastal Carolina Math Teachers’ Circle

South Dakota
- Sioux Falls: Sioux Falls Area Math Teachers’ Circle

Tennessee
- Knoxville: Tennessee Eastern and Appalachian Math Teachers’ Circle
- Nashville: Middle Tennessee Math Teachers’ Circle

Texas
- Austin: Mathematics Teachers’ Circle of Austin
- College Station: Brazos Valley Math Teachers’ Circle
- Corpus Christi
- El Paso: El Paso Math Teachers’ Circle
- Nacogdoches: East Texas Math Teachers’ Circle
- Seguin: South Central Texas Math Teachers’ Circle

Utah
- Salt Lake City: Utah Teachers’ Math Circle

Vermont
- Middlebury: Middlebury Math Teachers’ Circle

Virginia
- Emory
- Petersburg: Central Virginia Math Teachers’ Circle
- Reston: Northern Virginia Math Teachers’ Circle
- Richmond: Greater Richmond Math Teachers’ Circle
- Hampton: Hampton Roads Math Teachers’ Circle