Improving trainer decisions into a CVE for training applying ZPD concept

Assign the students the appropriate task associated with this own capabilities and knowledge, and form rights groups among team members are two main problems that a Pedagogical Agent –acting like a trainermust solve into a Collaborative Virtual Environment for training. We use reusable learning objects design by contract to formulate a Student Knowledge Model and a student ZPD, concepts derived from Intelligent Tutorial Systems and Vygotsky’s social theory, respectively. These models could help the trainer to improve its work facilitating information about the current student knowledge and the knowledge what s/he is ready to learn, then the student task assignation and the grouping into the team could be improving. Key-Words: Collaborative Virtual Environments for Training, ZPD, Student Knowledge Model, and Reusable Object Learning by Contract.