He teaches courses on emerging technology, new forms of property and equally new forms of social control; neo-liberalism and 21st Century policing and corrections; and justice, media and crime. Dennis' essays have regularly appeared in CTheory. His essays and reviews have also appeared in Postmodern Culture, The Education Policy Analysis Archives, the Academic Exchange Quarterly, Rhizomes, Culture and Agriculture, Fast Capitalism, and First Monday, as well as in new and reprinted form in several print anthologies.