This paper reviews a series of field-based clinical experiences which are among those we are currently developing in the preservice science teacher-preparation program at the University of Iowa. In the current program, sophomore, junior, and senior students are participating in a series of clinical experiences and coordinating seminars. The four-year program at Iowa, depicted in Figure I . integrates professional education with the Yea. FR so JR SR TOTAL COLLEGE PROGRAM m C 9 6