This book introduces readers to the theory of practice architectures and conveys a way of approaching practice theory through developing a practice sensibility. It shows that, in order to change our practices, we must also change the conditions that make those practices possible. The book draws on everyday life to illustrate how we can see the world by watching it unfold in practices: it argues that life happens in practices. The theory of practice architectures takes the ontological nature of practices seriously by recognising that practices take place in the real world. Consequently, the book offers a new perspective on how practices happen amidst a vast world of happenings; on how we participate in the “happening-ness” of the world through our practices. It invites us to consider whether our practices reproduce or aggravate the contemporary environmental crises confronting the Earth, and whether we can transform our current practices to ameliorate these crises. Given its focus and scope, the book will benefit master’s and doctoral students in social and educational theory, early career researchers, and established researchers new to practice theory.