Abstract
This paper presents and models theco-built knowledge and practice process in participatory action research in the field of Sciences of Education and Training: the « Growing up with Nature » PARproject.This research studiesthe effects of outdoor education on children and on adults,in their school environment according to practice and space. Furthered by the French Network for Nature and Environment Education, through its methods, tools and principles,this research partnership is characterized by ahorizontality associative culture. This article demonstratesthat the design stages of the PAR processisderived from learning partnership practicesrelated to this culture,andPARprojects arefashioned as Education and Research learning partnerships.This framework might in the long run provide markers for this kind of research so as to assess both means and ends.