In this research, we present an authoring environment, Edu-Interact, that supports the creation of adaptive interactive digital storytelling based games. Edu-Interact allows to design a story that seamlessly evaluates the student knowledge, performs the subsequent adaptation of the digital storytelling, and provides a summative assessment. The authoring environment allows also to assign weights to different concepts the student could accumulate through the interaction with the storytelling. This can provide a score that could be used as a means of gamifying the interactive digital storytelling or provide teachers or other stakeholders with feedback on the student performance.