In the course of his research career, much of which was based in his own classrooms, Wolff-Michael Roth explored numerous new theoretical frameworks when the old ones proved to be unable to account for the data. In this book, surrounding 11 of his publications spanning 20 years of work, the author tells a story of how science education research concretely realized and singularized itself. That is, rather than taking sole credit for the work that ultimately came to bear his name, Roth develops a historical narrative in which his work came to realize cultural-historical possibilities inherent in the field of science education. But perhaps because some types of this work came to be realized for a first time, Roth’s research also came to be characterized by others in the community as “cutting edge.” This work, therefore presents as much an auto/biographical narrative as it presents a cultural-historical recollection of science education as it unfolded over the past two decades.