How do you establish a classroom culture in which students routinely conjecture and think mathematically? How do you establish a way of working with teachers, using video, in which discussion supports professional development? The present book offers answers to these questions through an in depth (enactivist) study of one exceptional teacher in one innovative mathematics department in the UK. The book reveals some striking parallels between working to support students’ mathematical thinking and working to support teacher learning. A case is made for the importance of metacommunication in both contexts - communication about the communications that are occurring. For example, there is compelling evidence from a classroom that metacommunication, linked to the words ‘conjecture’ and ‘becoming a mathematician’, supports student metacognition and mathematical thinking. In working with teachers or students, offering these powerful metacommunications seems to require a heightened listening. With a heightened listening, attention is placed not just in what is said, but in what kind of a thing is said, with the teacher or facilitator being alongside the individuals in the wider group. "Read this book if you’re a teacher for insights into how one teacher establishes a classroom culture where her children are doing mathematics, ‘being mathematicians’ and reflect on what you want in your own classroom. Read this book if you’re a teacher educator to reflect on parallels between teaching and running professional development sessions, particularly using video. If you do not fit in either of these categories, read this book and use stories in your life." - Laurinda Brown, University of Bristol.

A new 2024 translation of Martin Heidegger's major work "Being and Time" (Sein und Zeit), originally published in 1927 in multiple publications. This edition contains a new afterword by the Translator, a timeline of Heidegger's life and works, a philosophic index of core Heideggerian concepts and a guide for terminology across 19th and 20th century Existentialists. This translation is designed for readability and accessibility to Heidegger's enigmatic and dense philosophy. Complex and specific philosophic terms are translated as literally as possible and academic footnotes have been removed to ensure easy reading. Being and Time presents a complex philosophical discourse on the nature of being (Sein) and time (Zeit), focusing in particular on the temporal-existentialist concept of Dasein, a term that combines the German words for "to be" (sein) and "there" (da). This classic philosophic work examines the traditional metaphysical understanding of being, arguing that this understanding, typically based on the idea of a constant presence, fails to account for the temporal and existential dimensions of being. Heidegger proposes that an understanding of being requires an analysis of Dasein, which is characterized not only by its existence, but also by its being in the world and its temporal existence. The concept of Dasein is central to the his argument, emphasizing that Dasein is always already situated in a world, and its understanding of being is shaped by its temporal existence. This perspective challenges traditional metaphysical notions of being as static and unchanging, proposing instead that being is fundamentally temporal and connected to human existence and understanding. As the title suggests, Heidegger sees the question of Being as indistinguishable from Time, arguing that Newtonian conceptions of time as a series of now-points are inadequate for understanding the being of Dasein. His Ontochronology argues that the existential and ontological analysis of Dasein reveals a more fundamental concept of time, one that is integral to the structure of Being itself. The text further elaborates on the idea of "thrownness" and several other existentialist themes. Thrownness is one of the three conditions that signifies Dasein's immersion in the world, where it finds itself already entangled in a web of relations and meanings. This "thrownness", combined with Dasein's inherent being-toward-death, underscores the existential condition of human beings, framing their existence as a continual engagement with their own finitude and the possibilities of their being. Heidegger posits that understanding the nature of being requires a fundamental rethinking of both being and time, dogmatically stating that the true nature of being can only be grasped through an understanding of the temporality that characterizes the existence of being.