نبذة مختصرة : The main purpose of this research is to assess the early algebra didactic-mathematical knowledge of primary school teachers. Its content has been introduced in the school curriculum of the National Council of Teachers of Mathematics (NCTM, 1989 and 2000) and the Common Core State Standards Initiative (CCSSI, 2010), and has also been included in the Chilean curriculum from the first year of primary school since 2012 (MEC, 2007; MINEDUC, 2012). Considering that research in this field is scarce and that inclusion of early algebra from the first years of primary school is a complex issue for primary education teachers in Chile, we decided to create an instrument to inquire into the didactic-mathematical knowledge of primary school teachers.
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