We conducted an exploratory study about the relationship between teachers' knowledge and fourth-grade students understanding, in the case of fractions. We studied the content knowledge (CK) and the pedagogical content knowledge (PCK) of 53 teachers and quantified their teaching experience, their mathematical preparation and the socioeconomic and academic background of the schools where the study was conducted. We applied one test at the beginning and one at the end of the school year to 1.532 students, identifying the gains and achievements of each group in the teachers' classrooms. The constructivist-oriented subcomponent of the teachers' CK showed a significant association with student learning, although it is less significant than the association with the teacher's experience. Socioeconomic factors were strongly associated with student achievement, confirming the strong divisions that characterize the chilean education system.
teaching number in preschool preservice teachers: The effect of a didactic of mathematics course Conhecimento para ensino do número em futuras educadoras da educação infantil:
RESUmEn: El presente artículo presenta el diseño y validación de un instrumento sobre el "conocimiento para la enseñanza del número en futuras maestras de educación infantil". El instrumento se fundamenta en tres componentes teóricos referidos al conocimiento docente: i) los conceptos lógico matemáticos asociados a la construcción del número, ii) la organización de la enseñanza y iii) las etapas del aprendizaje de nociones de lógica y número. El instrumento plantea dos situaciones de aula de educación infantil para suscitar el conocimiento docente. Los resultados muestran que el instrumento posee validez de contenido y validez de constructo, alcanzando una consistencia interna de 0.72. Se concluye que el instrumento validado para medir el saber de las maestras para la enseñanza del número puede ser de utilidad en programas de formación docente en educación infantil. Palabras clave: Educación preescolar. Formación de docentes. Educación matemática.*http://dx
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