TEAI Region 3 Cook County ● Air Force Academy High School, Chicago ​ ● Alcott Humanities High School, Chicago ​ ● Amundsen High School, Chicago ​ ● Victor J. Andrew High School, Tinley Park ​ ​ ● Argo Community High School, Summit ​ ​ ● Austin Community Academy High School, Chicago ​ [15] ● Back of the Yards College Preparatory High School, ​ Chicago ​ ​ ● Bais Yaakov High School, Chicago ​ ● Beacon Academy, Evanston ​ ​ ● Bloom High School, Chicago Heights ​ ​ ● Bloom Trail High School, Chicago Heights ​ ​ ● Bogan High School, Chicago ​ ● Bowen High School, Chicago ​ ● Bremen High School, Midlothian ​ ​ ● British International School of Chicago Lincoln Park, Chicago ​ ● Bronzeville Alternative Academy, Chicago ​ ● Bronzeville Scholastic Institute, Chicago ​ ● Gwendolyn Brooks College Preparatory Academy, Chicago ​ ● Brother Rice High School, Chicago ​ ● Buffalo Grove High School, Buffalo Grove ​ ​ ● Calumet Career Prep Academy, Chicago ​ ● Dr. Pedro Albizu Campos High School, Chicago ​ ● Carver Military Academy, Chicago ​ ● Chicago Academy for the Arts, Chicago ​ ● Chicago Academy High School, Chicago ​ ● Chicago Christian High School, Palos Heights ​ ​ ● Chicago Excel Academy, Chicago ​ ● Chicago High School for Agricultural Sciences, Chicago ​ ● Chicago High School for the Arts, Chicago ​ ● Chicago International Charter School Northtown Academy, Chicago ​ ● Chicago Math and Science Academy, Chicago ​ ● Chicago Military Academy, Chicago ​ ● Chicago Technology Academy, Chicago ​ ● Chicago Virtual Charter School, Chicago ​ ● Chicago Vocational High School, Chicago ​ ● Chicago Waldorf School, Chicago ​ ● Christ the King Jesuit College Prep High School, Chicago ​ ● Christian Heritage Academy, Northfield ​ ● Christian Liberty Academy, Arlington Heights/Wheeling Township ​ ● Michele Clark Magnet High School, Chicago ​ ● Roberto Clemente Community Academy, Chicago ​ [16] ● Collins Academy High School, ​ Chicago ​ ​ ● Community Services West Career Academy, Chicago ​ ● James B. Conant High School, Hoffman Estates ​ ​ ● Corliss High School, Chicago ​ ● Cosmopolitan Preparatory School, Chicago ​ ● Crane High School, Chicago ​ ● Cristo Rey Jesuit High School, Chicago ​ ● Curie Metropolitan High School, Chicago ​ ● De La Salle Institute, Chicago ​ ● DePaul College Prep, Chicago ​ ● Devry Advantage Academy, Chicago ​ ● Disney II Magnet High School, Chicago ​ ● Douglass Academy High School, Chicago ​ ● Dunbar Vocational High School, Chicago ​ ● DuSable High School, Chicago ​ ● Dyett High School, Chicago ​ ● East Leyden High School, Franklin Park ​ ​ ● Dwight D. Eisenhower High School, Blue Island ​ ​ ● Elgin High School, Elgin ​ ​ ● Elk Grove High School, Elk Grove Village ​ ​ ● Elmwood Park High School, Elmwood Park ​ ​ ● Evanston Township High School, Evanston ​ ​ ● Evergreen Park Community High School, Evergreen Park ​ ​ ● Farragut Career Academy, Chicago ​ ● Fasman Yeshiva High School, Skokie ​ ​ ● Fenger Academy High School, Chicago ​ ● Fenwick High School, Oak Park ​ ​ ● Foreman High School, Chicago ​ ● Forest View Alternative School, Arlington Heights ​ ​ ● William Fremd High School, Palatine ​ ​ ● Gage Park High School, Chicago ​ ● Garfield Alternative High School, Chicago ​ ● Glenbrook North High School, Northbrook ​ ​ ● Glenbrook South High School, Glenview ​ ​ ● Goode STEM Academy, Chicago ​ ● Ray Graham Training Center, Chicago ​ ● Guerin College Preparatory High School, River Grove ​ ​ ● Hales Franciscan High School, Chicago ​ ● John Hancock College Preparatory High School, Chicago ​ ● Harlan Community Academy High School, Chicago ​ ● Harper High School, Chicago ​ ● John Hersey High School, Arlington Heights ​ ​ ● Hillcrest High School, Country Club Hills ​ ​ ● Hirsch Metropolitan High School, Chicago ​ ● Hoffman Estates High School, Hoffman Estates ​ ​ ● Holy Trinity High School, Chicago ​ ● Homewood-Flossmoor High School, Flossmoor ​ ​ ● Hope College Prep High School, Chicago ​ ● Hubbard High School, Chicago ​ ● Hyde Park Academy High School, Chicago ​ ● Ida Crown Jewish Academy, Chicago ​ ● Illiana Christian High School, Lansing ​ ​ ● Infinity Math Science & Tech High School, Chicago ​ ● Jones College Prep High School, Chicago ​ ● Josephinum Academy, Chicago ​ ● Juarez Community Academy, Chicago ​ ● Jubilee Academy, Chicago ​ ● Julian High School, Chicago ​ ● Kelly High School, Chicago ​ ● Kelvyn Park High School, Chicago ​ ● John F. Kennedy High School, Chicago ​ ● Kenwood Academy, Chicago ​ ● King College Prep, Chicago ​ ● Lake View Academy, Chicago ​ ● Lake View High School, Chicago ​ ● Lane Technical College Prep High School, Chicago ​ ● Latin School of Chicago, Chicago ​ ● Latino Youth High School, Chicago ​ ● Lemont High School, Lemont ​ ​ ● Leo Catholic High School, Chicago ​ ● Lincoln Park High School, Chicago ​ ● Robert Lindblom Math & Science Academy, Chicago ​ ● Little Village Lawndale High School Campus, Chicago ​ ● Lourdes High School, Chicago ​ ● Loyola Academy, Wilmette ​ ​ ● Lubavitch Boys High School, Chicago ​ ● Lubavitch Girls High School, Chicago ​ ● Lubavitch Mesivta of Chicago, Chicago ​ ● Luther East High School, Lansing ​ ​ ● Luther High School North, Chicago ​ ● Luther High School South, Chicago ​ ● Lycée Français de Chicago, Chicago ​ ● Lyons Township High School, La Grange ​ ​ ● Maine East High School, Park Ridge ​ ​ ● Maine South High School, Park Ridge ​ ​ ● Maine West High School, Des Plaines ​ ​ ● Manley Career Academy High School, Chicago ​ ● Marian Catholic High School, Chicago Heights ​ ​ ● Marist High School, Chicago ​ ● Marshall Metropolitan High School, Chicago ​ ● Mather High School, Chicago ​ ● Morgan Park Academy, Chicago ​ ● Morgan Park High School, Chicago ​ ● J. Sterling Morton High School District 201, a district in Cicero and Berwyn that competes ​ athletically as "Morton High School", comprising the following campuses: ○ J. Sterling Morton High School East, Cicero ​ ​ ○ J. Sterling Morton Freshman Center, Cicero ​ ​ ○ J. Sterling Morton High School West, Berwyn ​ ​ ● Mother McAuley Liberal Arts High School, Chicago ​ ● Mount Assisi Academy, Lemont ​ ​ ● Mount Carmel High School, Chicago ​ ● Muhammad University of Islam, Chicago ​ ● Nazareth Academy, La Grange Park ​ ​ ● New Trier High School, Winnetka ​ ​ ● Niles North High School, Skokie ​ ​ ● Niles West High School, Skokie ​ ​ ● Noble Street College Prep, Chicago ​ ● North Cook Young Adult Academy, Des Plaines ​ ​ ● North-Grand High School, Chicago ​ ● North Lawndale College Prep High School, Chicago ​ ● North Shore Country Day School, Winnetka ​ ​ ● Northridge Preparatory School, Niles ​ ​ ● Northside College Preparatory High School, Chicago ​ ● Northside Learning Center, Chicago ​ ● Northwest Suburban Academy Arlington Heights ​ ● Notre Dame College Prep, Niles ​ ​ ● Notre Dame High School for Girls, Chicago ​ ● Oak Forest High School, Oak Forest ​ ​ ● Oak Lawn Community High School, Oak Lawn ​ ​ ● Oak Park and River Forest High School, Oak Park ​ ​ ● Ogden International High School, Chicago ​ ● Orr Academy High School, Chicago ​ ● Our Lady of Tepeyac High School, Chicago ​ ● Palatine High School, Palatine ​ ​ ● Antonia Pantoja High School, Chicago ​ ● Francis W. Parker School, Chicago ​ ● Walter Payton College Prep, Chicago ​ ● Wendell Phillips Academy High School, Chicago ​ ● Phoenix Military Academy, Chicago ​ ● Prospect High School, Mount Prospect ​ ​ ● Prosser Career Academy, Chicago ​ ● Providence St. Mel School, Chicago ​ ● Proviso East High School, Maywood ​ ​ ● Proviso Mathematics and Science Academy, Forest Park ​ ​ ● Proviso West High School, Hillside ​ ​ ● Queen of Peace High School, Burbank ​ ​ ● Al Raby High School, Chicago ​ ● Reavis High School, Burbank ​ ​ ● Regina Dominican High School, Wilmette ​ ​ ● Resurrection High School, Chicago ​ ● Rich Central High School, Olympia Fields ​ ​ ● Rich East High School, Park Forest ​ ​ ● Rich South High School, Richton Park ​ ​ ● Richards Career Academy, Chicago ​ ● Harold L. Richards High School, Oak Lawn ​ ​ ● Ridgewood High School, Norridge ​ ​ ● Riverside Brookfield High School, Riverside ​ ​ ● Paul Robeson High School, Chicago ​ ● Rolling Meadows High School, Rolling Meadows ​ ​ ● Roosevelt High School, Chicago ​ ● Roycemore School, Evanston ​ ​ ● St. Benedict High School, Chicago ​ ● St. Francis de Sales High School, Chicago ​ ● St. Ignatius College Prep, Chicago ​ ● St. Joseph High School, Westchester ​ ​ ● St. Laurence High School, Burbank ​ ​ ● St. Patrick High School, Chicago ​ ● St. Rita of Cascia High School, Chicago ​ ● St. Thomas of Villanova Catholic Secondary School, Palatine ​ ​ ● St. Viator High School, Arlington Heights ​ ​ ● Carl Sandburg High School, Orland Park ​ ​ ● Schaumburg High School, Schaumburg ​ ​ ● Carl Schurz High School, Chicago ​ ● Senn High School, Chicago ​ ● Seton Academy, South Holland ​ ​ ● Alan B. Shepard High School, Palos Heights ​ ​ ● Simeon Career Academy, Chicago ​ ● South Shore High School, Chicago ​ ● South Side Baptist School, Oak Lawn ​ ​ ● Southland College Preparatory Charter High School, Richton Park ​ ● Southside Occupational Academy, Chicago ​ ● Amos Alonzo Stagg High School, Palos Hills ​ ​ ● Steinmetz College Prep, Chicago ​ ● Streamwood High School, Streamwood ​ ​ ● Sullivan High School, Chicago ​ ● Taft High School, Chicago ​ ● Tallgrass Sudbury School, Riverside ● Telshe High School, Chicago ​ ● Thornridge High School, Dolton ​ ​ ● Thornton Fractional North High School, Calumet City ​ ​ ● Thornton Fractional South High School, Lansing ​ ​ ● Thornton Township High School, Harvey ​ ​ ● Thornwood High School,