The recent interest in Big Data has generated a broad range of new academic, corporate, and policy practices along with an evolving debate amongst its proponents, detractors, and skeptics. While the practices draw on a common set of tools, techniques, and technologies, most contributions to the debate come either from a particular disciplinary perspective or with an eye on a domain-specific issue. A close examination of these contributions reveals a set of common problematics that arise in various guises in different places. It also demonstrates the need for a critical synthesis of the conceptual and practical dilemmas surrounding Big Data. The purpose of this article is to provide such a synthesis by drawing on relevant writings in the sciences, humanities, policy, and trade literature. In bringing these diverse literatures together, we aim to shed light on the common underlying issues that concern and affect all of these areas. By contextualizing the phenomenon of Big Data within larger socio-economic developments, we also seek to provide a broader understanding of its drivers, barriers, and challenges. This approach allows us to identify attributes of Big Data that need to receive more attentionautonomy, opacity, and generativity, disparity, and futurity -leading to questions and ideas for moving beyond dilemmas.

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Digital information and communication technologies (ICTs)

ABSTRACT:This study describes an example of design-based research in which we make theoretical improvements in our understanding, in part based on empirical work, and use these to revise our curriculum and, simultaneously, our evolving theory of the relations between contexts and disciplinary formalisms. Prior to this study, we completed a first cycle of design revisions to a game-based ecological sciences curriculum to make more apparent specific domain concepts associated with targeted learning standards. Of particular interest was using gaming principles to embed standards-based science concepts in the curricular experience without undermining the situative embodiment central to our design philosophy. In Study One reported here, the same first-cycle elementary teacher used the refined secondcycle curriculum, again with high-ability fourth graders. We then analyzed qualitative and quantitative data on student participation and performance to further refine our theory and revise the curriculum. In Study Two, another teacher implemented a further refined secondcycle curriculum with lower achieving fourth graders, including several students labeled as having special needs. We use the design trajectory and results to illustrate and warrant the creation of a situationally embodied curriculum that supports the learning of specific disciplinary formalisms.

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