This is an essential resource for teachers who work in challenging circumstances, which might include formal education systems in the developing or developed world and informal or non-formal teaching in areas with growing numbers of refugees or displaced people. It draws on academic and professional research to provide practical advice that will help teachers address concerns including teaching large classes, working with limited resources and supporting learners who have experienced interrupted education and who may be suffering from trauma. It offers suggestions for creating a positive learning environment and implementing effective teaching practice and discusses the importance of resilience and wellbeing.