Yes (at least in the short term).
We did a study in 2003-2006 with the Kenyan Ministry of Education and a non-profit International Child Support. In their Analysis, Esther Duflo, Pascaline Dupas and Michael Kremer found positive results both from training teachers in the national AIDS curriculum, and providing incentives for girls to stay in school.
As for longer-term impacts, we are currently implementing a follow-up study, tracking down twenty thousand students from the initial study to see how they are doing today.
Watch this space!