Significant progress has been made in the identification of factors associated with an increased risk of developing cancer. Cancer is increasingly viewed as a preventable disease. Its prevention involves risk reduction counseling. This counseling is an important skill for the family physician but can be difficult to learn and to teach. We used a prototype, computer-assisted cancer risk reduction counseling curriculum with first-year medical students. We found a statistically significant change in both knowledge-based and attitudinal questions and answers after the use of this curriculum.