This experimental study examined the effects of teacher self-disclosure via Facebook on anticipated college student motivation, affective learning, and classroom climate. Participants who accessed the Facebook website of a teacher high in self-disclosure anticipated higher levels of motivation and affective learning and a more positive classroom climate. In their responses to open-ended items, participants emphasized possible negative associations between teacher use of Facebook and teacher credibility. Participants offered recommendations for teachers regarding the use of Facebook and other weblog services. (Contains 3 tables.)