The effectiveness of a group counseling smoking cessation program for adolescents was measured using quantitative and qualitative approaches. The study found higher quit rates at 4 months for those in the counseling intervention group compared to the non-intervention group. However, the differences in quit rates diminished after 8 and 12 months, possibly due to a lack of continued monitoring and support. Qualitative analysis found strengths of the program included improved student behavior and motivation, but weaknesses included time constraints and lack of school administrator commitment.