Students Upgrading Mathematical Achievement (SUMA) is a part of the Bilingual Mathematics and Science Achievement project for Spanish-speaking Limited English Proficient (LEP) students. Its objective is to provide both remedial tutoring to students lacking mathematics skills and enrichment to students who are potentially gifted in mathematics. Sixty-two high school students were student-tutors to 513 elementary and junior high school LEP students in eight schools in two school districts. A licensed teacher acted as advisor for every five student-tutors. Tutors' attitudes about the program were positive. Project personnel and school staff indicated that tutors had developed a sense of responsibility, commitment, and self-confidence. Based on the findings, two recommendations were made: (1) develop an evaluation design which ensures that similar instruments and procedures are used throughout the program; and (2) follow students to assess retention of mathematics skills acquired in the program. The appendices include a table illustrating program evaluation results. (YP)