This free course, Exploring economics: the secret life of t-shirts, aims to describe what goes into making and selling t-shirts. Which resources, which markets, who is involved, the income people get, the income and value they create are all discussed. You will explore these questions at different stages of the production of a t-shirt, and you'll use concepts from economics such as 'supply chains' or 'value added' to answer them. The course will be described using data. You should think about key numbers and data which help constructing evidence of how a t-shirt is produced, from raw cotton to our wardrobe.