摘要：Instruments and chances available via Web 2.0 allow to the e-learning to use them to propose user centered environments in which this latter becomes the main actor in the building his/her vocational training. The user don’t found his/her training ways on pre-established paths, but founds on informal building paths of sense that arise from web interaction and shared jobs (blog, forum, chat). The social community is the most effective frame, nevertheless she will have to determine whit certain rules the quality of created and available knowledge, avoiding as authoritative as ineffective controls.
