DemiDec

DemiDec is a private, for-profit educational company that produces curriculum and provides academic competitions for high school students, primarily focused on the Academic Decathlon. The company develops the materials used by participating schools, manages registration for regional, state, and national competitions, and provides resources to assist schools in preparing their teams.

DemiDec replaced the United States Academic Decathlon Association (USADA) as the provider of materials and competition management for the Academic Decathlon program starting in the 2015-2016 academic year. This transition resulted in some controversy and changes in the structure and content of the competition. Key differences included modifications to the curriculum and testing formats.

The company's products are used by thousands of high schools across the United States and in some international locations. They provide materials covering subjects such as science, literature, art, music, social science, economics, and mathematics, all tied to a specific annual theme. DemiDec's role is primarily administrative and curricular; local, state, and national Academic Decathlon competitions are still organized and run by independent organizations.