TRADITIONAL METHODS for teaching science courses at the post-secondary level employ a lecture format of instruction in which
the majority of students are passively listening to the instructor and jotting down notes. Current views of learning and instruction
challenge the wisdom of this traditional pedagogic practice by stressing the need for the learner to play an active role in
constructing knowledge. The emerging technology of classroom communication systems offers a promising tool for helping instructors
create a more interactive, student-centered classroom, especially when teaching large courses. In this paper we describe our
experiences teaching physics with a classroom communication system called
Classtalk. Classtalk facilitated the presentation of questions for small group work as well as the collection of student answers and the display
of histograms showing how the class answered, all of which fed into a class-wide discussion of students’ reasoning. We found
Classtalk to be a useful tool not only for engaging students in active learning during the lecture hour but also for enhancing the
overall communication within the classroom. Equally important, students were very positive about
Classtalk-facilitated instruction and believed that they learned more during class than they would have during a traditional lecture.
ABOUT THE AUTHORS
Robert Dufresne received his Ph.D. in theoretical nuclear physics from the University of Massachusetts at Amherst where he is now a Research
Assistant Professor in the Department of Physics and Astronomy. He is principal investigator on several federal grants. His
current interests include investigations of problem-solving performance among novices and experts and research on the effectiveness
of different instructional approaches using classroom communication systems.
William Gerace has a Ph.D. in theoretical nuclear physics from Princeton University. He is a faculty member in the physics department at
the University of Massachusetts and director of the Scientific Reasoning Research Institute. He has published extensively
in both nuclear physics and physics education. For the last fifteen years, he has been engaged in research and development
in physics education. Professor Gerace has been a principal investigator on numerous federal grants. His educational research
has focused on investigations of expert-novice differences in physics and on using findings from this research to develop
a framework for knowledge acquisition, organization, and use. He is currently applying this framework in the development of
a high-school physics curriculum that focuses on concept-based problem solving and in the development of general instructional
strategies and curriculum materials for use with classroom communication systems.
William Leonard has a Ph.D. in theoretical nuclear physics from the University of Massachusetts at Amherst where he is a Research Assistant
Professor in the Department of Physics and Astronomy. He has worked in educational research and development for over 10 years.
His current interests include developing a high school physics curriculum called “Minds-on Physics” and applying cognitive
models to the development of curricula for classroom communication systems.
Jose Mestre received his Ph.D. in theoretical nuclear physics from the University of Massachusetts at Amherst where he is a professor
of physics. For the last decade and a half, he has been engaged in cognitive studies of problem solving in mathematics and
physics. His current interests focus on the acquisition and use of physics knowledge by experts and novices, and on developing
physics curricula that promote conceptual development through problem solving. Professor Mestre has published numerous articles
and two books on problem solving in the sciences and mathematics and has served on committees and boards for the National
Research Council, the College Board, the Educational Testing Service, and the American Association of Physics Teachers.
Laura Wenk is a doctoral student in Curriculum Reform in the School of Education at the University of Massachusetts at Amherst. She
received an M.S. in Botany and an M.Ed. in secondary science education from the University of Massachusetts. She taught biology
and physical science at the high-school level for six years. Her current research interests include investigations of how
active learning in science lecture courses affect women’s attitudes towards science, and their perceptions of themselves as
scientists.