Supervision and coaching strategies that provide immediate feedback can help improve instruction for novice teachers. In this study, feedback was provided to teachers using "bug-in-ear" technology to coach them to deliver effective instructional interactions: "learn units." Three novice teachers in K-8 classrooms with students with disabilities including emotional disorders, autism, attention-deficit/hyperactivity disorder, and developmental delays participated in the study. Results from the multiple-baseline design showed that the rate and accuracy of effective teaching behaviors increased when in-class feedback was delivered via the electronic "bugs." For two of the three teachers, these increases maintained when the instructional feedback was faded. This study extends previous research and suggests an effective coaching supervision strategy for novice teachers. (Contains 2 tables and 1 figure.)