<?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>1983-2117</journal-id>
<journal-title><![CDATA[Ensaio Pesquisa em Educação em Ciências]]></journal-title>
<abbrev-journal-title><![CDATA[Ens. Pesqui. Educ. Ciênc.]]></abbrev-journal-title>
<issn>1983-2117</issn>
<publisher>
<publisher-name><![CDATA[Universidade Federal de Minas Gerais]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1983-21172018000100015</article-id>
<article-id pub-id-type="doi">10.1590/1983-211720182001020</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[A LUA NA MÃO: MEDIAÇÃO E CONCEITOS COMPLEXOS NO ENSINO DE ASTRONOMIA]]></article-title>
<article-title xml:lang="es"><![CDATA[LA LUNA EN LA MANO: MEDIACIÓN Y CONCEPTOS COMPLEJOS EM LA ENSEÑANZA DE LA ASTRONOMIA]]></article-title>
<article-title xml:lang="en"><![CDATA[THE MOON IN MY HAND: MEDIATION AND COMPLEX CONCEPTS IN ASTRONOMY TEACHING]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lago]]></surname>
<given-names><![CDATA[Leonardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ortega]]></surname>
<given-names><![CDATA[JOSÉ LUIS]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mattos]]></surname>
<given-names><![CDATA[CRISTIANO]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade de Cambridge Faculdade de Educação ]]></institution>
<addr-line><![CDATA[Cambrige ]]></addr-line>
<country>United Kingdom</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade de São Paulo Programa Interunidades em Ensino de Ciências ]]></institution>
<addr-line><![CDATA[São Paulo SP]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade de São Paulo Instituto de Física ]]></institution>
<addr-line><![CDATA[São Paulo SP]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>01</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>01</month>
<year>2018</year>
</pub-date>
<volume>20</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://educa.fcc.org.br/scielo.php?script=sci_arttext&amp;pid=S1983-21172018000100015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://educa.fcc.org.br/scielo.php?script=sci_abstract&amp;pid=S1983-21172018000100015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://educa.fcc.org.br/scielo.php?script=sci_pdf&amp;pid=S1983-21172018000100015&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO: Neste trabalho apresentamos uma atividade escolar de observação e registro das fases da Lua, e discutimos os resultados à luz da teoria vygotskiana de mediação e formação de conceitos. Mostramos como alterações na atividade permitiram aos estudantes elaborar modelos cada vez mais complexos de fases da Lua, ao apropriarem instrumentos mediadores com maiores graus de generalidade. Isto possibilitou aos estudantes estabelecer relações com o fenômeno contextualmente mais ricas e cientificamente mais precisas. Os dados empíricos são produções dos estudantes durante os três anos nos quais a atividade foi modificada. Discutimos os resultados em termos do desenvolvimento da atividade e da consciência dos estudantes sobre o fenômeno na medida que explicavam, previam e construíam o modelo científico de forma cada vez mais complexa.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN: En este trabajo, presentamos una actividad escolar relativa a la observación y registro de las fases de la Luna y discutimos los resultados a la luz de la teoría vygotskiana de mediación y formación de conceptos. Mostramos cómo cambios en la actividad permitieron a los estudiantes elaborar modelos cada vez más complejos de las fases de la Luna, al apropiarse de instrumentos mediadores con más grados de generalidad. Esto les permitió establecer relaciones con el fenómeno, contextualmente más ricas y científicamente más precisas. Los datos utilizados son producciones de los estudiantes durante los tres años en que la actividad fue modificada. Discutimos los resultados en términos del desarrollo de la actividad y de la conciencia de los estudiantes sobre el fenómeno, mostrando cómo ellos lograron explicar, predecir y construir el modelo científico de forma cada vez más compleja.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT: In this work, we present a school science&#8217;s activity regarding observation and recording of the moon phases and discuss the results in light of the Vygotskian theory of mediation and concepts formation. We show how changes in the activity allowed students to elaborate increasingly complex models of moon phases, by appropriating mediating instruments with higher degrees of generality. This enabled students to establish contextually richer and more scientifically precise relationships with the phenomenon. The data comprises student productions during the three years in which the activity was modified. We discuss the results in terms of the development of activity and students&#8217; conscious awareness about the phenomenon when they explained, predicted and built the scientific model in gradually more complex ways.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Formação de conceitos]]></kwd>
<kwd lng="pt"><![CDATA[Mediação]]></kwd>
<kwd lng="pt"><![CDATA[Ensino de Astronomia]]></kwd>
<kwd lng="es"><![CDATA[Formación de conceptos]]></kwd>
<kwd lng="es"><![CDATA[Mediación]]></kwd>
<kwd lng="es"><![CDATA[Enseñanza de la Astronomía]]></kwd>
<kwd lng="en"><![CDATA[Concepts formation]]></kwd>
<kwd lng="en"><![CDATA[Mediation]]></kwd>
<kwd lng="en"><![CDATA[Astronomy teaching]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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