<?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>2448-8089</journal-id>
<journal-title><![CDATA[Educación matemática]]></journal-title>
<abbrev-journal-title><![CDATA[Educ. mat.]]></abbrev-journal-title>
<issn>2448-8089</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Investigación y Divulgación de la Educación Matemática A.C.; Universidad de Guadalajara]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-80892019000200161</article-id>
<article-id pub-id-type="doi">10.24844/em3102.07</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Desarrollo del sentido estructural en alumnos universitarios mediante el uso de la Teoría de la Variación en el manejo de expresiones algebraicas racionales]]></article-title>
<article-title xml:lang="en"><![CDATA[Development of structure sense in university students through the use of Variation Theory in handling rational algebraic expressions]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ascencio Gonzalez]]></surname>
<given-names><![CDATA[Rebeca]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Eccius-Wellmann]]></surname>
<given-names><![CDATA[Cristina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Panamericana Escuela de Ciencias Económicas y Empresariales ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>31</volume>
<numero>2</numero>
<fpage>161</fpage>
<lpage>194</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-80892019000200161&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-80892019000200161&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-80892019000200161&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Desarrollar un sentido estructural permite al alumno realizar tareas algebraicas de formas más eficientes y menos propensas a errores, por lo que es relevante fortalecerlo. Se presentan en este artículo los resultados de una investigación cuyo objetivo fue desarrollar el sentido estructural en estudiantes universitarios, mediante la elaboración, implementación y prueba de actividades de enseñanza-aprendizaje que, a la par, promuevan el desarrollo de habilidades para simplificar y operar expresiones algebraicas racionales. El diseño de las actividades se basó en la Teoría de la Variación. Se definieron y ponderaron descriptores del sentido estructural, para fines de comparación. Se aplicaron evaluaciones antes y después de la implementación de las actividades, a cuatro grupos experimentales y tres de control. Se observó un incremento del nivel de sentido estructural estadísticamente superior en los grupos experimentales con respecto a los grupos de control. Se comprobó que es posible desarrollar, en mayor medida, el sentido estructural en los alumnos, al incluir, en las actividades que realizan, contrastes y variaciones elegidos con esa intención.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: To develop a structure sense allows a student to perform algebraic tasks in more efficient ways and with fewer errors, so it is relevant to strengthen it. This article presents the results of a study whose objective was to develop the structure sense of university students, through the creation, implementation and testing of teaching-learning activities that, at the same time, achieve the development of skills to simplify and operate rational algebraic expressions. The activities were designed based on Variation Theory. Descriptors of the sense of structure were defined and weighted for comparison purposes. Evaluations were applied before and after the implementation of the activities, to four experimental groups and three control groups. A statistically higher structure sense level was observed in the experimental groups with respect to the control groups. This proved that it is possible to achieve a greater development of the sense of structure in students, through activities that include contrasts and variations chosen intentionally.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Sentido estructural]]></kwd>
<kwd lng="es"><![CDATA[estructura algebraica]]></kwd>
<kwd lng="es"><![CDATA[Teoría de la Variación]]></kwd>
<kwd lng="es"><![CDATA[actividades de enseñanza-aprendizaje]]></kwd>
<kwd lng="es"><![CDATA[expresiones algebraicas racionales]]></kwd>
<kwd lng="en"><![CDATA[Structure sense]]></kwd>
<kwd lng="en"><![CDATA[algebraic structure]]></kwd>
<kwd lng="en"><![CDATA[Variation Theory]]></kwd>
<kwd lng="en"><![CDATA[teaching-learning activities]]></kwd>
<kwd lng="en"><![CDATA[rational algebraic expressions]]></kwd>
</kwd-group>
</article-meta>
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