Both students and teachers recognize the need for vocabulary to use English well. Despite this, many learners do not develop the vocabulary necessary to be confident in English. This presentation looks at how we can develop more systematic approaches to teaching vocabulary. First, it discusses why we should study English in the first place, showing how knowledge of English opens up many communication opportunities. Next, it will explore how much vocabulary is required to read and listen in English. Finally, it will outline a number of principles which underly effective vocabulary teaching opportunities.