The pre-class part of the lesson consists of two vocabulary exercises. In the first one, students decide what the differences in meaning are between four pairs of words (e.g. shortage and excess). They can consult a dictionary if necessary. In the second task, students need to complete gaps in sentences to create collocations useful when talking about supply chain management (e.g. a shortage of goods). The vocabulary they’ve learned in that part of the lesson will be needed when watching and discussing the video.