Problem-based learning is an approach to learning that continues to grow and develop and the variations in its use still tend to cause much debate in higher education. The idea for this book emerged out of discussions with colleagues about the need for the problem-based learning community to illustrate such variety in a research-based text. It is a book that does not present a single view about what counts as problem-based learning, nor does it offer ideal ways of undertaking it in a module, course or programme. Instead it presents chapters from academics in a range of disciplines and countries who have not only implemented problem-based learning but also researched their own practice and the practice of others. Since the book focuses on individuals’ own courses and modules and their disciplinary interests, much of the research here is qualitative