official sister institution with the Pestalozzi-Froebel Teachers College, a family-run school centered on training its students for teaching kindergarten. As the president of the Pestalozzi-Froebel Teachers College, Bertha Hofer Hegner assumed the role as the fourth president of Columbia College of Expression in 1929 when Scherger resigned to become an assistant pastor of St. Paul's Evangelical Lutheran Church. Hegner served as the institutions' head, although due to illness, her son, Herman Hofer Hegner served as acting president of the institutions from 1930 until 1936. By 1934, college curriculum also focused on the growing field of radio broadcasting. In 1934, Herman Hofer Hegner hired Norman Alexandroff, a radio programmer, to develop a radio curriculum for the colleges as both institutions were suffering financially. When Bertha Hofer Hegner retired in 1936 due to health reasons, she was made president emeritus of the institutions and Herman Hofer Hegner became the institutions' official president. During Herman Hofner Hegner's presidency, the Columbia College of Expression was advertised under different names including, Columbia College of Speech and Drama, the Radio Institute of Columbia School of Speech and Drama, and Columbia College of Speech, Drama, and Radio. However, the college was never incorporated under any of these names by the state of Illinois. As the radio program gained prominence, Alexandroff was named as the vice president of the Columbia College of Expression and became a member on the board of directors at both institutions by 1937. The college left its partnership with the Pestalozzi-Froebel Teachers College, named Norman Alexandroff as its president, and filed the Columbia College of Expression as a not for profit corporation on December 3, 1943. On February 5, 1944, the college re-filed as a not for profit corporation and changed its name to Columbia College. During the late 1940s and early 1950s, the college broadened its educational base to include television, journalism, marketing, and other mass-communication areas. Alexandroff also oversaw the development of the extension campuses of the school, Columbia College Pan-Americano in Mexico City, Mexico, and Columbia Los Angeles in Los Angeles, California. Both of these campuses became independent of their parent in the late 1950s. Prosperity was short lived, however, and by 1961, the college had fewer than 200 students and a part-time faculty of 25. Norman Alexandroff remained the president of the college until his death on May 26, 1960, and his son, Mirron (Mike) Alexandroff, assumed the role of