A critical ingredient for understanding the experiences that students undergo in the transition from elementary school to junior high school is the students' changing perceptions. The Ecological Perspectives for Successful Schooling Practice Junior High School Transition Study tapped the perceptions of students in transition using data from two instruments that were administered by cooperating school districts. Students completed the Student Opinion Survey (SOS), an instrument measuring general attitudes toward school, at the end of the sixth and seventh grades. Students also completed a Concerns Questionnaire during the fifth week of seventh grade. For this instrument, students responded to a list of potential transition concerns by indicating the degree of their concern both when they first entered junior high school and at the present time. Results from the two instruments are different in that students expressed fairly consistent dissatisfaction with junior high school on the SOS, but indicated few problems in the transition to junior high school. Explanations for this discrepancy are considered. The report contains 62 tables, and the SOS survey and Concerns Questionnaire are appended. (JM)