The purpose of the study was to explore the potential effectiveness of service learning as a pedagogical technique for providing substance abuse education to human services/social work students. Using a quasi-experimental design, the authors assigned 38 human services undergraduate students to experimental and comparison groups on the basis of their availability to attend a service-learning project in substance abuse. The service learning consisted of a 30-min educational presentation followed by a visit to a residential substance abuse treatment facility for women. Results indicated that service learning in substance abuse had a positive effect on the general knowledge, perceptions, and attitudes of human services students toward substance-dependent mothers and their children. The findings from this exploratory study support future research in this area. (Contains 2 tables.)