Many controversial subjects characterize geography in the 21st century. Issues such as climate change, sustainability and social exclusion generate much discussion and often involve clear differences in opinion of how they might be addressed. Higher education is an important space for critical engagement with challenging issues. Preparing for and participating in debates enables students to develop critical thinking skills, alongside a variety of oral presentation and discussion skills. This paper reflects on the potential for teaching through debate in geography. The arguments are illustrated through a debate about whether asylum seekers should be allowed to work in the UK. (Contains 4 tables, 1 figure, and 1 note.)