Given that society combines a poor ability to predict future technology with a good ability to forget poor past predictions, the author decided to create a course on "the history of future technology." The initial idea was to simply showcase a litany of failed technofuturist attempts and projects, and, in so doing, teach students to be more critical of contemporary technology and its surrounding social narratives. In time, this basic course idea branched into a rich network of theories and concepts on science, technology, and society. This article discusses details of what the class collectively learned about the relationships between past, present, and the imagined future.