Reuse of mathematical problems and answers with e-learning system

For a class of “Exercises in Mathematics”, handouts which consist of mathematical problems from basic to advanced exercises are prepared and distributed every week. In the class, a teacher demonstrates the problem solving process of a sample basic problem with some comments on the crucial points. After his demonstration, students try to solve problems on the handouts. However, many students make logical mistakes which can be avoided easily if they understand the demonstration. In this paper, in order to increase the opportunities of making sensitive for the logical thinking in mathematics, we propose a method of reusing these handouts and answers with an e-Learning system.