Although vocabulary acquisition research has shed much light on practical methods for increasing lexical knowledge (Nation, 1994), many foreign language teachers hesitate to implement focused vocabulary-training programs in their classrooms. The reasons most often cited for this hesitation are associated with the difficult tasks of creating, managing and disseminating vocabulary sets. Luckily, an online-based solution has emerged, i.e. Quizlet® (https://quizlet.com/). Quizlet® is a free online flashcard program that supports various vocabulary training approaches. Originally created by a high school student as a means to learn French vocabulary items, Quizlet® has grown to become the most popular online flashcard system in the world with over 20 million registered users. Moreover, Quizlet® continues to add functionality to the website and its excellent mobile applications. According to quantcast.com, more than 20 percent of Quizlet® page views originate from mobile device browsers. Of particular interest to foreign language instructors is Quizlet®'s capability to support vocabulary terms in multiple languages (through its audio and auto-define functions) and create class and individual student progress reports. The author has successfully integrated Quizlet® into a variety of university-level English courses in Japan and hopes to introduce this powerful teaching and learning resource to other foreign language instructors. [For full proceedings, see ED564162.]