Quizlet has been known as a modern tool for learning and revising vocabulary. Therefore, the purpose of this study is to explore whether the implementation of Quizlet in the English classroom at Academy of Policy and Development would have a positive effect on vocabulary development. Experimental method with 30 first year students and 5 English teachers was utilized to find out potential benefits and probable difficulties in the teaching and learning vocabulary with Quizlet. Tests, questionnaire and interview were implemented to look for the results. Despite of the fact that results of the experiment did not prove that using Quizlet could lead to better improvement and that it is more effective than studying with vocabulary lists, it has certain benefits that might be highly appreciated both by teachers and students.