The Stratospheric Observatory for Infrared Astronomy (SOFIA) represents a partnership between NASA and the German Aerospace Center (DLR). The observatory itself is a Boeing 747 SP that has been modified to serve as the world's largest airborne research observatory. The SOFIA Airborne Astronomy Ambassadors (AAA) program is a component of SOFIA's Outreach and provides professional development for educators from around the United States by partnering them with research scientists who collect data while aboard SOFIA. The program is intended to inspire educators and learners in the STEM disciplines. Inverness Research conducted the external evaluation of SOFIA's Cycle 1 Airborne Astronomy Ambassadors (AAA) program, collecting data that demonstrate the power of the AAA model while highlighting areas for improvement and growth. This evaluation brief summarizes data collected from surveys and interviews with Cycle 1 Ambassadors from March 2012 to July 2014.