Creating authentic digital learning experiences associated with classic field trip locations is a growing educational practice. One form of this developing field of educational programming is an electronic field trip, which involves student activities, teacher curriculum, and a live broadcast from the target location. This study provides the first nationwide large-scale investigation of the effectiveness of electronic field trips in promoting student learning. Data analyses on 1,568 participants' responses to a 32-item test created by the educational programming staff at the Grand Canyon National Park demonstrated that students with access to all components of the field trip (prebroadcast learning materials in addition to the live programming) showed the greatest levels of performance. Furthermore, analyses of individual item difficulty indices demonstrated that content presented via multiple streams of communication enjoyed the greatest growth scores when comparing the students with and without full access to the learning materials. (Contains 2 tables and 1 figure.)