Complex sentence: She worked as a grade school teacher in Milwaukee until moving to Washington, D.C., in 1951 where she took courses in speech and drama at The Catholic University of America to improve the skills she would need to pursue her dream of becoming a broadcaster.
Split into simpler sentences: She worked as a grade school teacher in Milwaukee, before moving to Washington, D.C. in 1951. She took courses in speech and drama at The Catholic University of America to improve the skills she would need to pursue her dream of becoming a broadcaster.