Abstract
Although e-learning systems have widely been used to assist the university lectures, those systems with tests evaluation using the IRT（item response theory）have just begun, and such a case is not so well known, in particular, for mathematics education in universities. In this paper, 1） we describe the superiority of the IRT evaluation results over the raw score evaluation by comparing these two methods, and 2）we show a small e-learning system in which the IRT evaluation system is included to grasp the abilities of students toward mathematics and to enhance the interest to learn mathematics.
