1904- 1922: High School, comprising grades 8 through 11, met at the South Side School which also housed 1st-7th grades. North Side School also had 1st through 7th.
1905: First graduating class of the High School made up of five girls.
1908: First graduating class with boys.
1922: Arlington High School built on Cooper St. and Abram St., separating grades 8 – 11 from first through seventh grades.
1923: Arlington High students chose Colts as the mascot and the colors of kelly green and white, replacing the former colors of black and crimson.
1942: A twelfth grade was added to the high school format for children beginning school that year. Students already in school simply skipped a grade.
1950: First live Little Arlie; “Sons of the White & Green” composed by Jane Ellis/Dean Corey.
1951: Arlington High defeats Waco La Vega for the Class AA State Championship title.
1956: Last class to graduate from AHS on Cooper St. and Abram St.
1957: First class to graduate from AHS on Park Row.
1958: Former AHS reopens as Ousley Junior High, 8th grade only.
1963: Last class to graduate when Arlington High was the city’s only high school. Sam Houston High School opens in fall 1963.
Sam Houston, AISD's second high school, opened in the eastern part of Arlington in the Fall of 1963. The original boundary between Houston and Arlington High School was described by Cathy Brown of The Dallas Morning News as "a north/south zig zag." The boundary extended from a point near the intersection of Cooper at Mansfield northward to Arkansas Lane. From there, it extended east to Johnson Creek and then ran alongside the creek to Collins. After Collins the boundary traveled northward to the Arlington city limits. In 1965 AISD desegregated, so Arlington High School desegregated.
In 1970, Lamar High School opened, relieving some of the overcrowding at Arlington and Sam Houston. Cathy Brown of The Dallas Morning News said that "he effect on Arlington High School was huge" since the housing in the Arlington zone north to division had been moved to Lamar. 12th grade students that had been zoned out of Arlington High School continued to attend Arlington High School, despite being in the Lamar zone, so the class of 1971 had almost 1,000 students. Each subsequent class size was smaller.
1972: Principal James Crouch introduces slogan, “How Sweet It Is To Be In Colt Country.” at an outdoor pep rally.
1977: Logo with sideways horseshoe representing the “C” in Colts used for first time.
Martin High School opened in 1982. Because Martin, located in southwest Arlington, had opened, the attendance zone of Arlington High School lost many newly constructed houses for affluent people, as they had been rezoned to Martin. Brown also explained that "The Wimbledon area shifted west," The residents of Shady Valley area, still zoned to Arlington, were growing older, and the number of children was decreasing. The athletic teams at Arlington High School lost a lot of talent to Martin, due to the Martin rezoning.
1987: Colts lose to Odessa Permian in quarter finals begins the "Colt Stampede"
1988-89: Colts Junior Varsity and Varsity both go undefeated in regular season.
1992: Football makes the semi-finals for first time since 1950's
1997: Class of 2001 enters as freshmen; becomes first freshmen class in 40 years.
2008: Class of 2008 has first IB Students in Arlington to receive IB diploma
2008: Principal James Adams retires after serving AISD for 38 years. Jennifer Young selected to serve as AHS Principal.
Fine arts
Theatre
The Theatre Arts Department won the State Championship in UIL One-Act Play in 2005.
Orchestra
The orchestra has won Sweepstakes at UIL for over 35 consecutive years. The orchestra program has been receiving Sweepstakes since 1979. Nearly 300 students are in the Orchestra department.
Feeder patterns
Duff, Hill, Swift, South Davis, and a portion of Dunn Elementaries feed into Bailey. Bailey sends all of its students into AHS. Key, Short, and Foster feed into Gunn. Gunn sends the majority of its students to AHS and the rest go to Bowie or Martin. Carter junior high sends a small portion of its population to AHS.
