The concept of student-institution fit in higher education is clarified, and an approach that can be applied to different types of campuses is described. Also considered is the theoretical framework, including the concept of "person-environment interaction." Three sets of factors are important: student characteristics, institutional characteristics, and the effects of the interaction between the student and the institution. Student characteristics include personal attributes, needs, abilities, interests, and values, while institutional characteristics include physical, academic, social, and psychological attributes that affect the campus environment. To increase levels of fit between campus and student, enrollment managers need to define the campus environment and gather data as the basis for making changes when student-institution mismatches occur. An intervention model is described that allows the college to set goals based on intended outcomes for students, design programs and activities to help fulfill the goals, and measure how well the goals are being met. The model involves seven steps: valuing, goal setting, programming, fitting, mapping, observing, and recycling. Appended is a list of environmental assessment approaches, including the names of developers of the approaches. (SW)