The initial training of quality teachers is seen as a key to improving the learning outcomes of students in Chile. The TYMMI project is one of the initiatives being developed to provide a space for simulation for teaching practices in immersive virtual environments in Second Life and Open Sim. Initial Teachers Training belong to the School of Education at the Universidad Católica de la Santísima Concepción, participated during 2014 in the implementation of challenges, based on a pedagogical model and teaching strategies such as role play and problem-based learning. Through direct observation and blogs, the results show that participants have an important domain in the pedagogical and technological interaction. Despite the perception of the technical difficulties of using platforms, students emphasize that the experience has been supportive along their teaching practices, and it has allowed them to reinforce subject content, which poses a very motivating intellectual and technological challenge.