To provide a system for obtaining information of a degree of difficulty of lesson contents and a degree of contribution of learner understanding by allowing a server of an e-Learning having a database storing various numerous learning contents and a required time database storing required times of the learners by the e-learning to detect understanding contribution to the learners of learning contents and providing information of its contribution to computers of an educator and a leader in a graph (real distribution of the required times and group response curve distribution function).

The e-learning system is composed of client computers connected through a network, the various numerous learning contents, and the server having the required time database storing the learning required times of the learners. The server detects the heterogeneous learning process to visually provide the circumstances.