I teach in courses in digital and technical writing, as well as College Writing I and II, Intermediate Writing, and Teaching Writing with Technology. I have taught writing in computer-equipped classrooms since 1987, and on networked computers since 1988.
I use wikis in all the courses I teach. I prefer using wikis over a CMS such as D2L or Blackboard. On D2L, the workspace is separated from the course space. On a wiki, the spaces students work in become part of the course.
I'm recently experimented with using Twitter in two courses. In Weblogs and Wikis, students used it to update each other on projects, and incorporating it as a path into their main content. In Elements of E-Rhetoric, students investigated a variety of angles dealing with its rhetorical use.
Working on open wikis also means nearly all the course materials I work with are online and freely available under a Creative Commons license.
My main wiki is biro.erhetoric.org. Course wikis are at erhetoric.org.
