<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1607-4041</journal-id>
<journal-title><![CDATA[Revista electrónica de investigación educativa]]></journal-title>
<abbrev-journal-title><![CDATA[REDIE]]></abbrev-journal-title>
<issn>1607-4041</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma de Baja California, Instituto de Investigación y Desarrollo Educativo]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1607-40412020000100110</article-id>
<article-id pub-id-type="doi">10.24320/redie.2020.22.e10.2285</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Influencia del conocimiento profundo del profesor sobre fracciones en el aprendizaje de alumnos de 4o. grado]]></article-title>
<article-title xml:lang="en"><![CDATA[Influence of In-Depth Teacher Knowledge of Fractions on Learning in 4th Grade Students]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Rojas]]></surname>
<given-names><![CDATA[Palmenia de la Cruz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Navarrete Rojas]]></surname>
<given-names><![CDATA[Carlos Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de La Serena  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Chile</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>22</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1607-40412020000100110&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1607-40412020000100110&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1607-40412020000100110&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo de este estudio es establecer en qué medida el conocimiento profundo del profesor sobre fracciones y el conocimiento sobre la enseñanza de las mismas, ajustados por el nivel socioeconómico y el nivel de conocimientos en matemáticas que se alcanza en las escuelas (SIMCE), influye en el aprendizaje de los alumnos en cuanto a la conceptualización de las fracciones en 4o. grado. Con información de 378 alumnos de 4o. grado de 9 escuelas, así como de sus respectivos profesores de matemáticas, los resultados de los análisis de regresión muestran que el efecto Conocimiento Profundo del profesor es significativo en el aprendizaje por alumno (p = 0.001), más allá de lo explicado por el puntaje SIMCE del colegio, que también es significativo (p = 0.02).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The objective of this study is to determine the extent to which teachers&#8217; in-depth knowledge of fractions and knowledge of how to teach them, adjusted for socioeconomic level and level of knowledge attained in mathematics in schools (SIMCE), influences student learning in conceptualizing fractions in 4 th grade. With information from 378 fourth-grade students in 9 schools and their mathematics teachers, the regression analysis results show that teachers&#8217; in-depth knowledge has a significant effect on student learning (p = 0.001), beyond that explained by the school&#8217;s SIMCE score, which is also significant (p = 0.02).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Conocimiento del profesor]]></kwd>
<kwd lng="es"><![CDATA[fracciones]]></kwd>
<kwd lng="es"><![CDATA[enseñanza de las matemáticas]]></kwd>
<kwd lng="en"><![CDATA[Teacher knowledge]]></kwd>
<kwd lng="en"><![CDATA[fractions]]></kwd>
<kwd lng="en"><![CDATA[mathematics education]]></kwd>
</kwd-group>
</article-meta>
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