A client machine receives Web data including a learning material part from a learning server in an e-Learning center to display it as an Web page. The Web page includes a circle graph that represents the intelligibility of all learners who studied the learning material and a pair of bar graphs that represent the ratio of the achievers in the finishers who could not understand the learning material. A learner can make use of the status information represented by the graphs to his or her learning. After attending the learning material part, a learner clicks an "Understood" button or a "Not Understood" button to inform one's intelligibility to the learning server.
