In the spring of 2014, the Nanoscale Informal Science Education Network (NISE Net) Public Impacts evaluation team conducted a summative study of NanoDays, a nationwide festival of educational programs about nanoscale science, engineering, and technology. In 2014, NanoDays took place from March 29th – April 6th, 2014. The Network’s goals for NanoDays events led to the following summative evaluation questions: 1. What is the projected public reach of NanoDays events in 2014? 2. Are ‘mature’ NanoDays events successful in providing an engaging experience and promoting learning of nano concepts for