The process of installation of specified and instructional patterns in more than 200 elementary schools from ten states is evaluated. The findings of data gathered from questionnaires, site visits, training sessions, and interviews represent four major project procedures. Eight chapters cover the study as follows: I. Purposes, Background, and Summary; II. Instrument Development; III. School Survey Questionnaire; IV. District Survey Questionnaire; V. Detailed Installation Questionnaire; VI. Site Visits to Multiunit-IGE Schools; VII. Installation Models and Designs; and VIII. Conclusions and Recommendations. Included in four appendixes are the questionnaires used in the project: (a) School Survey; (c) District Survey; (e) Detailed Installation; and (g) Visit Report Forms. (For Volume II of this study see ED 066 624 in this issue.) (LS)