We investigate the evolution of the electrical resistivity of BaFe(2)As(2) single crystals with pressure. The samples used were from the same batch, grown using a self-flux method, and showed properties that were highly reproducible. Samples were pressurized using three different pressure media: pentane-isopentane (in a piston-cylinder cell), Daphne oil (in an alumina anvil cell) and steatite (in a Bridgman cell). Each pressure medium has its own intrinsic level of hydrostaticity, which dramatically affects the phase diagram. An increasing uniaxial pressure component in this system quickly reduces the spin density wave order and favours the appearance of superconductivity, which is similar to what is seen in SrFe(2)As(2).

In research-practice partnerships (RPPs), the line between researcher and practitioner can be blurred, and the roles for everyone involved may be unclear. Yet little is known about how these roles are negotiated and with what consequences for collaborative efforts. Guided by organizational theory, we share findings from a multiyear case study of one RPP, drawing on observations of partnership leadership meetings and interviews with school district leaders and partners. Role negotiation occurred in more than one third of leadership meetings, as evidenced by identity-referencing discourse. When roles were unclear, collaborative efforts stalled; once partners renegotiated their roles, it changed how they engaged in the work together. Several forces contributed to these dynamics, including the partner’s ambitious yet ambiguous identity and the introduction of new members to the group. This study offers implications for those engaged in partnership work and provides a foundation for future research regarding role negotiation in RPPs.

Purpose: Research indicates that a culture of learning is a key factor in building high schools that foster academic achievement in all students. Yet less is known about which elements of a culture of learning differentiate schools with higher levels of academic performance. To fill this gap, this comparative case study examined the cultures of learning among adults and students in two highly effective high schools and two less effective high schools with similar demographics in a single large, urban school district. Research Method: Using 135 interviews and focus groups with administrators, teachers, and students across four case study schools, the authors analyzed the extent to which various elements of a culture of learning was present within and across schools. Findings: Effective high schools had stronger cultures of learning with distinct structures and practices that distinguished them from the less effective schools. These included frequent opportunities for formal collaboration, shared goals centered on universal high expectations, structured opportunities for participatory leadership, and deliberate supports to help students engage and achieve in academics. Findings further revealed that certain structures were necessary though not sufficient in fostering effective cultures of learning, the active role of school leaders in reinforcing a culture of learning, and high leverage practices that addressed multiple elements of a culture of learning. Implications: This study provides implications for how school leaders can begin to create and improve on school-wide cultures of learning by drawing on the high leverage practices that distinguished the highly effective case study schools.

There is growing concern among researchers and governmental officials that knowing what works in education is important, but not enough for school improvement. Sound evidence alone is not sufficient for large-scale, sustainable change, both because practitioners may consider it irrelevant to their own problems of practice or run into challenges when they try to implement. Failed attempts at replicating positive outcomes in new (or simply expanded) settings underscore the need for a different relationship between research and practice, one that takes a systemic perspective on improvement and transforms the role for research. In this article, we describe the new science of improvement and where it sits in the evolution of research on education policy implementation. We discuss the roots of the approach as well as its key features. We explain how the work differs from that of traditional research and end with illustrations of this difference from our experiences with the National Center on Scaling Up Effective Schools.

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