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- From the left: Richard Ekdahl, Rhonda Durham, Geoffrey Butler
1952
“The Association of Texas Preparatory Schools,” ISAS’s predecessor, was founded. It consisted of a football league among Kinkaid, Lutheran, St. John’s, St. Mark’s, and St. Stephen’s and a girls and boys basketball championship.
1955
ISAS was founded in 1955 by Casady School in Oklahoma and seven Texas schools: The Hockaday School, The Kinkaid School, Saint Mary’s Hall, St. John’s School, St. Stephen’s Episcopal School, St. Mark’s School of Texas, and Texas Military Institute. The first meeting of ISAS involved 13 schools – 5 in addition to the founding schools: Allen Academy, Concordia, Peacock Military Academy, Radford School, and St. Mary’s Hall. The moving spirit in the organization of ISAS was Alan Chidsey, Headmaster of St. John’s.
1955
Richard Ekdahl, ISAS Executive Director Emeritus, became the first Executive Director of ISAS and served until 1996.
1956
Original Constitution Statement of Purpose was composed: “To encourage, support, and develop highest standards of attainment in the independent schools of the area and to recognize those schools in which they are maintained.”
1966
The phrase "to recognize by formal accreditation” was added to the purpose. In addition to traditional standards, ISAS accreditation depended upon the requirement that 75% of each graduating class successfully complete the freshman year of college.
1995
Geoffrey Butler became the second Executive Director of ISAS. The offices were moved from Tulsa, Oklahoma, to Fort Worth, Texas.
2005
Independent Schools Association of the Southwest reached its fiftieth anniversary honoring its advancement of high standards for independent schools in Texas, Louisiana, Oklahoma, New Mexico, Arizona, Kansas, and Mexico.
2005
Southwest Preparatory Conference (SPC) separated from ISAS to become a free-standing athletic conference.
2005
ISAS schools showed extraordinary camaraderie and heroic leadership in the wake of Hurricane Katrina. Duchesne Academy of the Sacred Heart and Academy of the Sacred Heart, Grand Coteau, took in over 420 students. At least 37 other ISAS schools made places for students from New Orleans.
2006
Rhonda Durham became the third Executive Director of ISAS. ISAS offices were moved from Fort Worth, Texas, to Midland, Texas.
2012
ISAS had grown to a membership of eighty-nine schools that stand for exceptional independent education across the region, enrolling over 50,000 students.