The problem of this study was to determine if there was a difference in the self-concept of two groups of ninth-grade students when one group received the services of junior and senior students in a Peer Assistance and Leadership class. The results of the Piers-Harris Children's—Self—Concept Scale were used to determine the difference between the mean self-concept scores of the two groups and also to determine if there was a relationship between the criterion variable of the total self-concept score and eight predictor variables as identified by House Bill 1010: Limited English proficiency, age, school attendance, achievement scores two or more years below grade level in reading and mathematics on a norm-referenced test, failure to master any portion of the Texas Educational Assessment of Minimum Skills, failure in two or more subjects, grade retention, and eligibility for free or reduced-price lunch. A total of 105 students, 50 in the experimental group and 55 in the control group, participated. The findings revealed that there was no significant difference in the mean self-concept scores of the two groups. The correlation revealed that there were significant differences between self-concept and the variables of mathematics achievement scores, failing grades, and eligibility for free lunch.