This long-term follow-up study of a universal school-based web-based intervention (Climate Schools)  to reduce hazardous substance use and a targeted school-based group-based intervention for those identified at risk (Preventure) found that both were effective at reducing alcohol use. No added benefit was observed by combining the interventions.

Newton, Nicola C. et al. The 7-Year Effectiveness of School-Based Alcohol Use Prevention From Adolescence to Early Adulthood: A Randomized Controlled Trial of Universal, Selective, and Combined Interventions. Journal of the American Academy of Child & Adolescent Psychiatry, Volume 0, Issue 0

https://www.jaacap.org/article/S0890-8567(21)01999-7/fulltext#secsectitle0010