A music track that lays a vocal from Madonna over guitars from the Sex Pistols. A classroom portal that presents automatically updated syndicated resources from the campus library, news sources, student events, weblogs, and podcasts and that was built quickly using free tools. A Web site that takes crime data from the Chicago Police and applies them to Google Maps, without being affiliated with either. Each of these is a product of the stunning growth in online materials available in reusable formats; each is energized by the character of digital culture; and each may be described as a "mashup." Mashups involve the reuse, or remixing, of works of art, of content, and/or of data for purposes that usually were not intended or even imagined by the original creators. For educators and policy-makers, already struggling with the many cultural and logistical challenges posed by digital technologies, mashups complicate the picture even while offering tremendous promise. This article talks about what constitutes a valid, original work and the implications for how educators and policy-makers assess and reward creativity. This article talks about "content mashups" as the educational remix and how "data mashups" are remixing functionality. (Contains 26 notes.)