The online testing system with explain function as students answer mistake

Aiming at current deficiencies of online testing system, students only know the making wrong, but also doesn't know the whys. In this paper, the online testing system is developed based on ASP.NET and AJAX technologies, which consists of 6 modules such as chapter test, comprehensive test, score query, management of test questions, etc. The online testing system is embedded into VB excellent curriculum website which has already been developed. Through more than one year application, it is demonstrated that system operation is stable, and that the goal that students self-exam the learned chapters, knowledge points, focuses and difficult points is targeted. In particular, the test questions analysis in the management module can promptly provide causes for students' the wrong answers. Therefore, students not only know the hows but also know the whys, which reaps students' affirmation.