Lo que PISA nos mostró: claroscuros de la participación de Uruguay a lo largo de una década.

The aim of this paper is to to analyze what PISA has allowed to know and understand the functioning of the national educational system. To this end it is proposed to expose some results which arise from participation of Uruguay in PISA during a decade, and highlight some characteristics of Uruguayan educational system from a comparative perspective with other states of same region. By the other hand, they are shared some local reflections about contributions of an international assessment such as PISA, its approach, and its role in the mark of the system of information and evaluation of national learning, and also, about how it should analyze, interpret and use its results.