Students in Colorado are now using vapor pens to smoke marijuana during class

Marijuana legalization: Vaping THC illnesses are strengthening the case for it - Vox

I Found a Vape Pen at My Son's School. Finding Out What Was Inside Was a Lot Harder. – Mother Jones

DODEA schools ban 'e-cigs,' with punishment up to expulsion

Berthoud vaping ban seeks to end e-cigarette use by high school students – Loveland Reporter-Herald

Cannabis Concentrates and Their (Scary) Effect on the Teenage Brain

Legally High at a Colorado Campus - The New York Times

Pot Smoke And Mirrors: Vaporizer Pens Hide Marijuana Use : Shots - Health News : NPR

1 In 4 Colorado Teens Vape, But More See The Health Risks

Trends and Characteristics in Marijuana Use Among Public School Students — King County, Washington, 2004–2016