This engaging KS3 Geography lesson uses the relatable topic of fast fashion to explore the real-world impacts of globalisation, building directly on prior learning about supply chains. Students investigate how a simple T‑shirt connects workers, consumers, businesses, and the environment across the globe, before analysing the positive and negative effects of global production. Through interactive activities such as card sorting, discussion, and GCSE-style 4‑mark questions with model answers, learners develop key geographical skills including explanation and evaluation. The lesson encourages critical thinking by asking students to consider who benefits most from globalisation and whether it is fair, introducing ideas of inequality and sustainability in an accessible way. With clear structure, strong scaffolding, and opportunities for stretch and debate, this lesson is ideal for KS3 classes and provides an excellent bridge to GCSE-level thinking on globalisation and development.