Certain features of the PLATO IV system allow the gathering of large quantities and varieties of information describing the interaction of students with computer based education courseware. Two kinds of information can be provided: (1) data concerning single student interaction, which must be analyzed manually; and (2) data summarizing activities of a student after many interactions, which can be manipulated by the PLATO system. Until recently, this type and volume of data have not been easily available. This report describes some initial attempts and the current status of efforts to collect, condense, and analyze these data for the purpose of diagnosing student problems and improving instruction. (Author)