ENTRY AGGREGATES AND STUDENTS’ ACADEMIC PERFORMANCE. A CASE STUDY OF SELECTED SECONDARY SCHOOLS IN MBARARA MUNICIPALITY BY BAGUMA PISON 16/BSU/BSCED/150 A RESEARCH REPORT SUBMITTED TO THE FACULTY OF EDUCATION IN PARTIAL FULFILLMENT OF THE REQUIREMENT FOR THE AWARD OF BACHELOR OF SCIENCE WITH EDUCATION OF BISHOP STUART UNIVERSITY MAY, 2019