Representations different inequalities concept: an analysis of textbooks of high school math
DOI:
https://doi.org/10.5007/1981-1322.2017v12n1p96Abstract
We present in this article an analysis, related to the concept of inequality and its different representations, carried out in six (06) textbooks of Mathematics of the 1st year of High School, approved by the National Program of Didactic Book - PNLD 2015. We seek to identify representations and possible treatments and conversions prioritized by the authors of these works, specifically regarding first-degree inequalities, product-inequality, inequality-quotient and simultaneous inequalities. For the analyzes, we consider all the exercises proposed in the referred sections and their respective answers indicated at the end of the student textbook. As a result, with regard to treatments, we emphasize that textbooks prioritize algebraic treatment for the resolution of inequalities. Regarding the conversions, our analyzes show that this cognitive activity is not prioritized by the authors. One of the works, because it presents a greater number of problem situations, facilitates the coordination between the natural and algebraic language registers, a fact that is positive for the teaching of Mathematics. Another work presents a greater number of graphic records, in relation to the other collections, fact that can enrich the learning of the studentDownloads
Published
2017-09-13
Issue
Section
Artigos
License
Authors hold the copyright and grant the journal the right for their articles' first publication, being their works simultaneously licensed under the Creative Commons Attribution License (CC BY), which allows the sharing of such works with its authorship acknowledged and its initial publication in this journal.
Authors are allowed to enter into separate additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or as a book chapter, with an acknowledgment of its initial publication in this journal).