Andrew E. Walker

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This paper reviews the literature surrounding an information filtering technique, collaborative information filtering, which supports the discovery of resources in a way that is sensitive to the context of users. Moreover, via statistical clustering techniques, the system supports automated, personalized filtering and recommendation of relevant resources(More)
This paper employs meta-analysis to determine the influence of computer-based scaffolding characteristics and study and test score quality on cognitive outcomes in science, technology, engineering, and mathematics education at the secondary, college, graduate, and adult levels. Results indicate that (a) computer-based scaffolding positively influences(More)
This paper describes the development of a review rubric for learning resources in the context of the Instructional Architect (IA), a web-based authoring tool. We describe the motivation for developing a review rubric, the process for creating it by synthesizing the rubrics of other education-related digital libraries, and the results of testing the rubric(More)
Acute renal disease is common in sub-Saharan Africa, with high mortality. Its etiology is poorly understood; quartan malaria owing to Plasmodium malariae was implicated in previous series. Few previous studies have included histological data; furthermore, much of the literature pre-dates the human immunodeficiency virus (HIV) epidemic. We report prospective(More)
This paper defines a model of teacher practice ("teaching as design"), and describes a professional development curriculum in which K-12 teachers design learning activities using resources and tools from education digital libraries. It then presents preliminary findings from an application of this model in which teachers' artifacts are analyzed to learn(More)
(2009). Reciprocal mentoring "in the wild": A retrospective, comparative case study of ICT teacher professional development. Abstract For teachers in the 21 st century it is become critical that they develop the skills to be able to teach in a world that is being transformed by technological innovations. These skills include effectively teaching in blended(More)