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Graphical user interfaces that show a theoretical concept are now common, but they cannot evaluate student learning because they do not capture user actions. In this paper, we describe a general-purpose movie tool that was developed for the recording and playback of MATLAB GUIs. Thus, instructors can create complicated examples quickly and easily. For evaluation of student learning, a student's actions can be monitored or graded by examining the log file that contains the GUI playback script.