We present a series of research results that suppor the socioepistemological thesis about an articulated and functional mathematical knowledge if the explanations about this knowledge construction changes from being centered on objects towards the practices. Whereas the first one leans in the idea of preexistance to the margin of the individuals' experience and the explinations arise from the mathematics itself, the periodic property socio-epistemologie that is now presented, the possibility is opened to enlarged the frameworks so they can take into account that which constitues mathematical knowledge. Our methodological aspect proposes the entrance of these practices into the didactic system by means of didactical designs in which they are developed of intentional way. In this way, evidence can be given on the knowledge resignification within human groups organization, favoring the signficant joints.
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