A box of e-cigarettes is photographed at the Alameda County Office of Education in Hayward, Calif., on Friday, Feb. 7, 2014. On February 11th the San Ramon Valley Unified School District is looking to pass a new policy that prohibits e-cigarettes and hookahs from their campuses. A number of school districts in Alameda, including Castro Valley and Berkeley, and the Santa Clara County Department of Education is also looking to update its policies on e-cigarettes. The Centers for Disease Control released figures last year that found that e-cigarette use among teens doubled from 2011 to 2012 and that an estimated 1.78 million students in middle and high school had tried e-cigarettes. (Doug Duran/Bay Area News Group)