In this study, the authors examine whether an advanced online technology can be used to give teacher trainees real-time feedback on their use of research-based classroom practices. Participants include 15 teachers enrolled in a field-based graduate special education teacher preparation program. Data include video-recorded teacher observations and written reflections by teachers about their experiences. Quantitative results indicate that the advanced online bug-in-ear technology is a practical and efficient way to provide immediate feedback to increase teachers' rate of praise statements and their use of proven effective instructional practices and that these improvements are accompanied by increases in students' on-task behavior. Overall, trainees view the advanced online technology as a powerful tool for improving the teaching and learning process but report the need for patience and perseverance in both the teachers and the supervisor, as well as teachers' need for constant reassurance. (Contains 3 tables.)