The purpose of the study is to investigate the effects of blogging on Turkish undergraduate students' achievement levels in issues of instructional technology in a computer course. Moreover, this study reflects the observations of the instructor and the opinions of the students regarding contributions of blogging to their knowledge acquisition and information searching and sharing skills. The methodological framework of the study is based on a pretest-posttest experimental design with a control group and qualitative research techniques including interviews, document analyses and observations. A total of 68 undergraduate first year students in two groups (N=34 in experimental, and N=34 in control) participated in the pretests and posttests. In addition, a total of 21 students took part in the interview process. The results showed that there was no significant difference between the mean achievement scores of the experimental and control groups in pretest. However, there was a significant difference between the mean scores of the experimental group and control group in the post test in favor of the experimental group. Also, the results indicated that the students in the experimental group had significantly higher scores in the posttest than in the pretest phase. As a result, both experimental and qualitative findings suggest that blogs can be used as supplementary mediums to promote achievement and knowledge acquisition of students as well as information searching and sharing skills within a learning community. (Contains 6 tables.)