Check out the article in the Portland Press Herald:
https://www.pressherald.com/2023/09/12/school-districts-grapple-with-vaping-in-high-schools/

Jake Giesmann, Deering High principal, said that they have tried different strategies, but the ones that have worked best so far have involved increasing supervision in areas where students are likely to vape, such as restrooms and hallways.
“Kids usually do the right thing if there’s an adult around,” Giesmann said...