The purpose of this paper is to describe HuMoS, an on-line simulator of human mortality models, and to explore its applications as a teaching tool for the Statistics courses in the Actuarial Degree of the University of Málaga. The purpose of HuMoS is to help with the understanding of the most important statistical concepts related to human mortality and its stochastic modeling, from an Actuarial point of view. The simulator has been developed as an interactive Java applet, which is embedded into the web pages of a section of the Actuarial Statistics course site, that we call SLAB (Survival Lab), so it can be easily accessed from any computer connected to Internet. The main advantage of using a simulator compiled as a Java applet is the conjunction of remote access with interactivity and the possibility of experimentation. The interface of the applet consists of two main areas: the graphic area shows the main functions of the model (survival function, distribution function of the age at death, instant hazard rate and annual mortality rate) and the parameter area, in which the user can modify the parameters to get in real time the response of the functions of the model. In order to get a good performance of the simulator as a learning tool, it is integrated into a guided program of activities of increasing level of difficulty, until the student could use it himself. These activities constitute the basis of SLAB, which also includes tutorials and descriptions of the most common analytical models of mortality.