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Describes the benefits that arise from the use of Light Emitting Diodes (LEDs) for illumination in industrial machine vision systems. These include long life, stability and narrow frequency bands. Also discusses precautions that need to be taken for obtaining a uniform illumination and pulsed operation.

The purpose of this paper is to explore the interface between high-stakes testing, disciplinary knowledge and teachers’ pedagogy in English. The most prevalent standardized assessment form in the current Australian context is the National Assessment Program for Literacy and Numeracy (NAPLAN) undertaken each year by students in Years 3, 5, 7 and 9 in all Australian States and Territories. Understood in the context of the Global Educational Reform Movement (GERM) (Sahlberg, 2011, pp. 100-101) – the NAPLAN tests serve as a bi-partisan governmental response to a perceived need to improve the quality of teachers and schools in Australia.

The authors draw on the key sociological constructs of Pierre Bourdieu (1995) to analyze the ways in which the writing component of the suite of NAPLAN tests serves to legitimize and idealize particular kinds of writing, writers and teachers of writing.

The authors suggest that in the absence of current literacy policy and curriculum instability, this national test shapes the literacy field, influencing the direction of writing practices and pedagogy, and, therefore, subject English itself, in Australian classrooms.

This assessment intervention is considered in the context of the history of writing, and addresses accordingly fundamental questions concerning the changing nature of the writing/writerly field, the impact of assessment on teachers’ conceptions of disciplinarity and pedagogical content knowledge and students’ experiences of writing and thinking in subject English.

This chapter details our story of developing and using a series of videocases in elementary science teacher preparation. The Reflecting on Elementary Science videocases provide models of best practices in reform-based elementary science teaching. They reduce the complexity of teaching into a manageable story situated in a specific context, so that preservice teachers can uncover and reflect upon their theories about science learning and teaching. Through an accompanying research program, we have found that the videocases perturb student thinking and catalyze them to think like a teacher as they refine their science education theories.