Andreatta-da-Costa, L. and Castilhos, A. da C. 2017. FACEBOOK ’S CONTRIBUTIONS TO MATH LITERACY IN THE 3RD YEAR PRIMARY EDUCATION. Observatory Journal. 3, 5 (Aug. 2017), 274–300. DOI:https://doi.org/10.20873/uft.2447-4266.2017v3n5p274.