Mantle of the Expert: the Legacy of Dorothy Heathcote

This thesis examines the educational drama practice of Dorothy Heathcote, who died in October 2011, and defines Mantle of the Expert, a model of learning and teaching that she invented and developed, as her legacy. Uniquely, it views this model through a historical and political framework. There is critical reflection on the failure of Heathcote’s earlier models to become mainstream drama practice in schools. Explanations are offered, such as recurring debates about the nature and function of educational drama, political pressures on curriculum design and a shift of interest from educational drama towards applied theatre. Mantle of the Expert is examined critically through case study methodology, as a situated learning system and cross curricular teaching tool. Interviews and observations with teachers, headteachers and other practitioners using the model in schools are analysed and findings presented. The features of the system as it is being practised are examined to establish whether or not a single version can be identified. Findings also embrace various aspects of professional development. Conclusions are offered about strategic models of introducing Mantle of the Expert in schools and the role of headteachers in promoting it. The impact of introducing this approach on relationships between staff in a small rural school is examined. The thesis critically explores the use of electronic media in establishing and sustaining a teaching and learning strategy. In particular, the role of a bespoke website is considered through extensive monitoring and analysis. A fundamental conclusion is that teachers who do not have an understanding of drama conventions and theatre form will have difficulty in delivering Heathcote’s model successfully. It is further concluded that Mantle of the Expert has a better chance of being sustained in English schools than Heathcote’s earlier models

Single Sublattice Endotaxial Phase Separation Driven by Charge Frustration in a Complex Oxide

Complex transition-metal oxides are important functional materials in areas such as energy and information storage. The cubic ABO₃ perovskite is an archetypal example of this class, formed by the occupation of small octahedral B-sites within an AO₃ network defined by larger A cations. We show that introduction of chemically mismatched octahedral cations into a cubic perovskite oxide parent phase modifies structure and composition beyond the unit cell length scale on the B sublattice alone. This affords an endotaxial nanocomposite of two cubic perovskite phases with distinct properties. These locally B-site cation-ordered and -disordered phases share a single AO₃ network and have enhanced stability against the formation of a competing hexagonal structure over the single-phase parent. Synergic integration of the distinct properties of these phases by the coherent interfaces of the composite produces solid oxide fuel cell cathode performance superior to that expected from the component phases in isolation