The data and computational procedures used by the IDEA system at Kansas State University (during the 1976-77 academic year) to interpret ratings of teacher performance are described in this technical report. The computations for each of the seven parts (evaluation, course description, students' self ratings, methods, additional questions, diagnostic summary, summary profile) of the IDEA Report are explained. A description of the data base used for 1976-77 includes information about the 4,888 courses evaluated at schools other than KSU. The size and types of these institutions are described and enrollment figures are provided. A major part of this report consists of 35 tables that provide all the comparative data necessary to convert the means of individual items into verbal comparisons, difference scores, percentile ranks, and other statistical analyses. A brief explanation of each set of tables is provided. Appended are an IDEA Report, IDEA Survey Form, and IDEA Faculty Information Form. (SF)