  Educational games are an increasingly popular teaching tool in modern
classrooms. However, the development of complementary tools for teachers
facilitating classroom gameplay is lacking. We present the results of a
participatory design process for a teacher-facing, real-time game data
dashboard. This two-phase process included a workshop to elicit teachers'
requirements for such a tool, and a pilot study of our dashboard prototype. We
analyze post-gameplay survey and interview data to understand teachers'
experiences with the tool in terms of evidence of co-design, feasibility, and
effectiveness. Our results indicate the participatory design yielded a tool
both useful for and usable by teachers within the context of a real class
gameplay session. We advocate for the continued development of data-driven
teacher tools to improve the effectiveness of games deployed in the classroom.
