Blogs have the potential to increase reflection, sense of community and collaboration in undergraduate classrooms. Studies of their effectiveness are still limited. The purpose of this study was to investigate whether the use of blogs in a large lecture class would enhance students' perceived learning. Students in an undergraduate nutrition course were required to engage in blog conversations over the course of the semester to promote reflective learning. Sixty-seven undergraduates responded to a survey with dimensions on perceived learning and sense of community. Sense of community and computer expertise were identified as significant predictors of perceived learning, when controlled for age, gender, and previous blogging experience. While a majority of the students reported that blogging enhanced their learning and led them to think about course concepts outside the classroom, fewer perceived value in peer comments. Implications for integrating blogging into undergraduate classrooms are discussed. (Contains 4 tables.)