The current status of secondary school media centers in Iowa was investigated to determine which of the three phases of development outlined in the state's "Plan for Progress in Media Centers, 7-12" they were in, and to identify positive and negative forces affecting their development. Quantitative data were derived from the 129 responses received to a questionnaire which was sent to 200 randomly selected secondary school librarians. Major findings include: (1) 47 percent of the media centers were below Phase I standards in eight categories--personnel, periodicals and newspapers, professional collections in books and periodicals, filmstrips, recordings, and budget; (2) school boards, administration, faculty, students, curriculum, and media professional abilities and backgrounds were cited by 50 percent of the respondents as aids to the media centers' development; (3) there was a ratio of one media professional per 438 students; and (4) 50 percent of the centers were primarily book oriented. It was concluded that the goal of reaching Phase III within five years was not being realized and there was an expressed need for increases in budget and personnel. A study of the patterns of development of Iowa's elementary school media centers using the same type of instrument was recommended. The questionnaire used in the study is appended. (JPF)