Barb Dutrow (LSU) and Darrell Henry (LSU) participated in, and lead portions of, an NSF-funded workshop on Teaching Petrology in the 21st Century that was held in July 2003 at and around Montana State University. The workshop attracted 75 faculty members from across the country. Highlights of the workshop included a 3-day field trip to the Stillwater Complex, the Beartooth Plateau and Yellowstone National Park, followed by 4 days of on-campus demonstrations, discussions and working group sessions. The goal of this workshop was to explore new methods of teaching igneous and metamorphic petrology in the context of modern advances in understanding the Earth system, analytical and field methods, and information technologies. The workshop not only included a pre-meeting field trip but also demonstrations of laboratories and computer-assisted learning activities, and general sessions addressing current issues in teaching petrology. Workshop outcomes include collections of instructional materials, plans for developing new materials, and establishment of working groups in key thematic areas. Instructional materials developed at the workshop are currently being reviewed, evaluated, and field-tested in classrooms. Participants actively contributed to, lead, and participated in workshop activities.