Open collaborative authoring systems such as Wikipedia are growing in use and impact. How well does this model work for the development of educational resources? In particular, can volunteers contribute materials of sufficient quality? Could they create resources that meet students' specific learning needs and engage their personal characteristics? Our experiment explored these questions using a novel web-based tool for authoring worked examples. Participants were professional teachers (math and non-math) and amateurs. Participants were randomly assigned to the basic tool, or to an enhanced version that prompted authors to create materials for a specific (fictitious) student. We find that while there are differences by teaching status, all three groups make contributions of worth and that targeting a specific student leads contributors to author materials with greater potential to engage students. The experiment suggests that community authoring of educational resources is a feasible model of development and can enable new levels of personalization.
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