Enabling the Indian Teacher/Resercher to deal with ethno-mathematics as to make him the ethnographer of his own culture and link between this knowledge and the occidental mathematics, in order to offer students an educational process that has criteria, has been for over twenty years, the main
focus of my work. And is also the objective of the Ethno-mathematics Research Program, which was created by Ubiratan D’Ambrósio.

Some of the mathematical knowledge of the Waimiri-Atroari Indians, form the north of the Amazonas – with whom I have been working for ten years enabling the teacher researcher of the village – and, most importantly, how some of their field researches have been successfully used in the village classes as mathematical activities are presented on this paper.