The document reviews the history and trends in educational data mining (EDM) research. It discusses how EDM has grown from early work analyzing student-computer interaction logs to using a variety of data mining and machine learning methods. Relationship mining was historically prominent but prediction and discovery with models have increased. The document also summarizes key applications of EDM including student modeling, knowledge modeling, pedagogical support analysis, and exploring educational theories. It analyzes the most influential early EDM papers and identifies trends like using EDM to study gaming behavior and develop student models.