Complex sentence: By the late 1970s and early 1980s, it had been transformed again with its Chicago Public high school, Fine Arts/Performing Arts school, the International Baccalaureate Program, and the honors high school program.
Split into simpler sentences: By the late 1970s and early 1980s, it had been transformed again with its International Baccalaureate and performing arts programs. There is the regular Chicago Public high school, Fine Arts/Performing Arts school, the International Baccalaureate Program, and the honors high school program.