Feedback can occur as a powerful stream of potentially useful information to improve student engagement and learning experience. But that flow is often both unidirectional and 'unfinished'. Without technology, it can also be time-consuming and tiring process. This presentation describes a few case studies of using a social feedback technology in classrooms because we were interested in closing the feedback loop. We recognize that, for many students, this can often only be fully achieved by facilitating confidential feedback. We recognize the importance of bidirectional 'dynamic feedback', in which students and instructors respond to each other in constructive, ongoing, iterative 'conversations'. The prize of using dynamic feedback technology is an enhanced learning environment.