In the anthropological-eicational perspective of ethnomathematics we investigate how native procedures of learning and preschool concepts impact on formal thinking (mainly basic mathematics). Linked with the culture-sensitive learning theories (Vygitsky to M. Cole) curricula and learning procedures are elaborated yielding success in the schooling of formal thinking (math). The visit of pror. Sal Restivo (Rennselaer pol., NY) as eminent researcher, wil finalise collaboration for a joint book publication.