The Mathematics Improvement Component (MIC) was first implemented in the Columbus (Ohio) Public Schools in 1987-88 to assist elementary and middle school pupils who were low achievers in mathematics. Three programs comprised the 1989-90 MIC: the Elementary Computer Assisted Instruction (Elem-CAI) Program, the Elementary Competency Based Education (Elem-CBE) Program, and the Middle School Competency Based Education (Middle-CBE) Program. In the first program, selected students were served an average of three times per week in computer-assisted instruction (CAI) labs, and classroom teachers delivered additional individual and small-group instruction. In both MIC-CBE programs, selected pupils were administered tests periodically that provided objective-based mastery information related to the Columbus district's course of study. All three MIC programs included ongoing diagnosis of mathematics difficulties and assessment of pupil progress based on the cooperative efforts of the program teachers and the classroom teachers. The three programs combined to serve 2,050 students in 31 elementary schools and 12 middle schools with the assistance of 44 teachers. (Besides the pupil census information, this report contains the following: standardized achievement test results; potential retainee/course failure information; and appendixes which include parental involvement surveys, inservice evaluation questionnaires, computer census tallies, and the process evaluation logs that were compiled by supervisors.) (JJK)