THE OPERATION OF BUENA VISTA HIGH SCHOOL IN SAGINAW, MICHIGAN, AND SUGGESTIONS FOR SYSTEM CHANGES WERE DESCRIBED IN THE THIRD OF A SERIES OF THREE REPORTS. OF GENERAL CONCERN WAS THE USE OF CLOSED-CIRCUIT TELEVISION IN GRADE 11 ENGLISH INSTRUCTION. THE STUDY WAS PART OF A GENERAL INVESTIGATION, USING SYSTEMS ANALYSIS AND COMPUTER SIMULATION TECHNIQUES, OF ORGANIZATIONAL MODIFICATIONS IN EDUCATION THAT SUPPORT THE USE OF INSTRUCTIONAL INNOVATIONS. SOME OF THE PROPOSED MODIFICATIONS FOR IMPROVEMENT OF THE SYSTEM WERE (1) ELIMINATION OF HALF GROUPS, (2) SIMPLIFICATION OF ATTENDANCE CHECKING PROCEDURES, (3) PROVISION FOR SMALLER DISCUSSION GROUPS, (4) MODIFICATION OF THE PRESENT SYSTEM TO PERMIT GROUPS TO BE RECONSTITUTED MORE READILY, AND (5) PROVISION FOR STUDENTS TO SPEND MORE TIME IN DIRECTED STUDY. TWO HYPOTHETICAL PROGRAMS WERE DEVELOPED WHICH REPRESENTED MAJOR CHANGES IN THE CURRENT PROGRAM. SIMULATIONS OF THE OPERATION OF THE PROPOSED PROGRAMS BY THE COMPUTER MODEL PROVIDED A MEANS TO EVALUATE THE POWER OF THE MODEL AND ITS POTENTIAL AS A TOOL. FLOWCHARTS AND TABLES WERE INCLUDED. THE GENERAL DESCRIPTION OF THE HIGH SCHOOL (ED 010 571) AND A DETAILED ANALYSIS OF THE TELEVISION SYSTEM (ED 010 572) WERE THE OTHER REPORTS OF THE SERIES. (RS)