Preparing Graduate Teaching Assistant's to Teach Introduction Geosciences in the 21st Century

Effective teaching requires in-depth content knowledge and pedagogical understanding of the subject. Most graduate teaching assistants (GTAs) are well prepared in content, they often lack pedagogical knowledge needed to teach undergraduate students. There are no consistent, nationwide standards for preparing GTAs in the delivery of high quality instruction in the Geosciences. Without formal training on strategies to engage students in active learning, GTA's often implement a traditional approach to teaching science modeled on their own learning experiences. In the Department of Geological and Environmental Sciences at CSU Chico, every semester approximately 700 undergraduate students enroll in GE courses with required lab sections taught by GTAs. Classroom observations completed by faculty members often reveal that GTAs have a good understanding of the content, but remain entrenched in traditional approaches to teaching science. Classroom observers commonly report on the lack of undergraduate student engagement, or the instructor's inability to ask skillful questions. We view this not as a shortcoming of the GTA, but as a weakness of their preparation. This study examines the outcomes of GTA's learning in a science teaching methods course offered in Spring 2008. This one unit pilot-course was designed to introduce reformed teaching practices to GTAs. In addition to addressing the mechanics of teaching, the course focused on six areas of instruction that were identified by faculty and GTAs as important areas for improvement. Faculty instructors completed classroom visits then met with GTAs to debrief and determine numerical rankings in the areas of reform teaching practices. Rankings helped GTAs select three of the six areas of instruction as goals for the rest of the semester. In the 14th week of class, GTAs ranked themselves again. In most cases, rankings assigned early in the course by GTAs and faculty instructors were within 0.5 points (on a 4 point scale) of each other. GTA improvements of reformed teaching practices were as much as 2.5 points higher than the initial rankings, with average improvement of 0.76 points. These outcomes led to implementation of a more in- depth course for GTA's in the form of a three- unit science teaching methods course for Fall 2008.