Paul J. Giguere
Education Development Center, Inc.
Newton, MA

Scott W. Formica
Social Science Research and Evaluation, Inc.
Burlington, MA

Wayne M. Harding
Social Science Research and Evaluation, Inc.
Harvard Medical School at The Cambridge Hospital

This article discusses five interaction strategies that can be used in large-scale (more than thirty participants) Web-based training. Evaluation data are presented from seven Web-based continuing education workshops conducted with United States Department of Education Middle School Drug Prevention and School Safety Coordinators (MSCs) that used two of these large-scale strategies. Results show, contrary to the current literature, MSCs who participated in large-scale Web-based training were highly satisfied with many aspects of the workshops, including the online facilitation. The results point to a need to replicate these findings and to further study additional large-scale interaction strategies in Web-based training and professional development.