This document summarizes a summer school on using unmanned aerial vehicles (UAVs) for environmental monitoring, held from July 27-31, 2015 in Matera, Italy. The 3rd edition of the summer school was a collaboration between Princeton University, University of Basilicata, and private companies, and involved lectures and hands-on training with UAVs. Students gained experience in using UAVs to monitor vegetation, hydrology, agriculture and more, and spent time in field experiments and flying UAVs. The agenda included introductory lectures, field training sessions, image processing lessons, and students presenting final projects using collected imagery.