The theory that differentiates real contract from consensual contract is originated from Roman.

Firstly, the new Contract Law hasn t stopped the argument about whether contracts for donation are consensual contracts or real contracts.

In the viewsight of anthropology,the development of vocational abilities is an aspect of social practice,the development process of vocational abilities is that the trainees understand and participate in the continuous changing social practice by the mode of "legitimate peripheral participation" in the community of practice,which emphasize that the developm.

This paper aims to explore the mechanism of Learning Study in enhancing teacher learning by adopting community of practices as the analytical framework.

Communities of Practice in School Context;

This research introduced the definition,basic theories and use of communities of practice,systematically.

On the issue of teachers professional development,we find out that constructing teachers communities of practice is an effective approach to promote teachers professional development in today s education reformation.