Abstract
Metadata quality is an important aspect of the usability of a digital repository. This article explores the quality of the metadata at three digital repositories that house math and science education materials and use the simple Dublin Core (DC) element set. The criteria for assessing the metadata quality at each repository were based on three characteristics: completeness, accuracy, and consistency. These three characteristics were chosen from a literature review of other such metadata studies. The degree to which each repository accomplishes these benchmarks in its use of the simple DC element set helps determine the repository's metadata quality and interoperability. In addition, the usage of the simple DC element set by each repository is also explored to determine the most frequently used terms versus the least used terms and to discover any terms that are used incorrectly.
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