The current study investigated the ways to improve the interaction through blogs in an information technology course, in which a constructive approach was employed. Eighteen students enrolled in the Department of Computer Education and Instructional Technologies at Anadolu University during the spring semester of the academic year 2006-2007 participated in the action research designed in accordance with the purpose of the study. The data were collected through different techniques and tools including observation and interviews. Content analysis and descriptive analysis were conducted to analyze data. To sustain credibility, conformability, consistency, and transferability, several strategies were adopted such as in-depth data collection and data triangulation. Findings revealed that the course, which was planned according to constructivist principles and applied through blogs, could improve both instruction and social interaction. Findings also suggested that participants’ needs regarding information sharing, instructional support and communication played an important role to improve interaction among participants and with the course instructor. Furthermore, it was observed that blogs could be used as tools to develop interaction in discussions and group works.