NGHIÊN CỨU MỘT TÌNH HUỐNG DẠY HỌC HÀM SỐ Y=AX (A≠0) TRONG NGỮ CẢNH CHI TIÊU CÁ NHÂN VỚI CHƯƠNG TRÌNH KHUYẾN MÃI

Abstract

          This article studies the situations of teaching a mathematical knowledge in connection with personal financial problems (S_M↔PF). The focus in this article is on development and implementation a situation of teaching linear function    with the context of personal spending during a sale promotion (S_Lf↔Ps). Firstly, we introduce the rationale of the study of S_M↔PF from the requirements of the math curriculum 2018 and describe the research methodology of the study by analysing a priori and explaining a posterior in S_M↔PF, based on the Theory of Didactical Situations in Mathematics by Guy Brousseau in the 70s. On the basis of a brief epistemological analysis about linear functions combined with an institutional analysis of math teaching, we clearly explain our choices when building S_Lf↔Ps. Finally, we analyse a priori  and a posterior of the situation S_Lf↔Ps.