This dataset contains raw data variables gathered during an educational research project for the Institute of Thermodynamics and Thermal Process Engineering (ITT) at the University of Stuttgart, 2014 until 2015. The project focused on requirements of study success and collected a variety of data on the student cohort in winter 2014 and summer 2015. This includes quantitative and qualitative data from interviews as well as non-responsive data from exams and the administrative departments. A major data analyis and interpretation as well as a thorough description of the research project and its data is scheduled for publication as a PhD paper in 2020 at the University of Stuttgart. The dataset also includes the surveys and a codebook.