A system includes a database configured to store a matrix of knowledge units, a curriculum generation unit configured to generate a curriculum for the user based on the matrix of knowledge units stored in the database, a knowledge providing unit configured to provide the user with the at least one problem and to provide the user with contents on the knowledge unit associated with the user's response to the at least one problem, and a user knowledge analysis unit configured to determine the user's achievement for the at least one knowledge unit based on a feedback that the user provided in response to at least one other problem, and to reflect information on the determined achievement to the database.