The Sheridan School District No. 2 is working with the University of Colorado College of Nursing to train teachers and staff members on how to use naloxone, a drug designed to rapidly reverse the opioid overdoses. “In the last year, since COVID, we've had a few students in the district who have lost their lives or lost family members related to overdoses," said Alexis Barrere, CU College of Nursing senior instructor and pediatric nurse practitioner.