Vocabulary knowledge is considered important in second and foreign language learning because learners' insufficient vocabulary has been consistently reported as a significant problem in their achievement of second-language (L2) learning. Despite of numerous vocabulary studies, few of them have implemented a learner-centered and interactive…

The importance of professional development (PD) is clearly understood; however, little is known about how the most effective PD influences teachers' learning and how teachers perceive PD that goes beyond the typical two-hour session on an aspect of instruction. In this article, the authors present the response of a group of middle school teachers…