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Abstract

This work aims to compare some aspects of the part of the Natural Sciences between two versions of the BNCC, the one that was undergoing a wide consultation and construction process and was abandoned after the 2016 coup with the one approved by the CNE in 2017, made on an urgent basis by the illegitimate government. General information is presented that justifies the deprecated version so that one can understand the profound differences between this version and the current one and approved by the CNE. In the deprecated version, in the field of teaching Natural Sciences, the construction of four training axes arising from the advances of educational research in this field in Brazil stands out, while the approved version reissues the competences and skills of previous governments introducing a novelty that was guide skills through Bloom's taxonomy. Finally, with examples from the 6th year, it is intended to make the differences between both versions concrete.