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Search Results: 1 - 10 of 20217 matches for " Elena Fabiola Ruiz Ledesma "
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Using an Interactive Computer System to Support the Task of Building the Notions of Ratio and Proportion  [PDF]
Elena Fabiola Ruiz Ledesma
Creative Education (CE) , 2010, DOI: 10.4236/ce.2010.12017
Abstract: This article describes the design and general outcome of applying a computer system that includes interactive activities to the topics of ratio and proportion. The work was undertaken with Mexican students attending primary school grade six (11 year olds). In designing the activities, our work was based on the studies of researchers who have focused on such topics, as well as on the work of researchers in the field of computer sciences and education technology. Support of the activities designed is found in psycho-pedagogy, in knowledge of mathematics and in the fields of computer sciences and education technology.
Representation Registers in the Solution of Calculus Problems  [PDF]
Elena Fabiola Ruiz Ledesma
Creative Education (CE) , 2011, DOI: 10.4236/ce.2011.23036
Abstract: This article is derived from the research project registered under number 20110343 (Ruiz, 2011), and developed in Escuela Superior de Cómputo del Instituto Politécnico Nacional (IPN) (School of Computer Sciences of the National Poly-technical Institute of Mexico). The article reports on the problems found among Engineering students with respect to their resistance to using different representation registers when solving optimization problems in the Calculus Learning Unit. Use of such registers could help the students to build mathematics know ledge and to solve calculus problems. As a didactic strategy, simulations are used in an electronic environment in order to support the students by fostering their use of tabular, graphical and algebraic representation registers. Interviews are undertaken of six of the professors who give the calculus courses, and a diagnostic questionnaire is applied to 68 students prior to and after working with the proposal. As for the theoretical framework, the work reported by Duval and Hitt is salient in this report, particularly their emphasis of the fact that working on activities by way of one single representation system is not sufficient. From the first responses provided by the students, one can conclude that the algebraic register is preferred by the majority of students. It is however used in a mechanical fashion without affording any meaning to the content of the problem and to the process of solving it. Another conclusion reported is that implementing tasks in the classroom in which the mathematics activity requires coherent use of different representations is necessary.
Primary and Secondary Teachers’ Knowledge, Interpretation, and Approaches to Students Errors about Ratio and Proportion Topics  [PDF]
Elena Fabiola Ruiz Ledesma
Creative Education (CE) , 2011, DOI: 10.4236/ce.2011.23035
Abstract: This study investigated elementary and secondary teachers’ understanding and pedagogical strategies applied to students making errors in finding a missing length in similar rectangles. It was revealed that secondary teachers had better understanding of ratio and proportion in similar rectangles than elementary teachers. While all secondary teachers solved the similar rectangles problems correctly, a large portion of elementary teacher struggled with the problem. In explaining their solution strategies, and even though similar strategies appeared both from elementary teachers and secondary teachers, a majority of secondary teachers pointed out the underlying idea of similarity, whereas less than half of the elementary teachers explained their reasoning for using ratios and proportion. This article is derived from the research project registered under number 20110343 (Ruiz, 2011), and developed in Escuela Superior de Cómputo del Instituto Politécnico Nacional (IPN) (School of Computer Sciences of the National Poly-technical Institute of Mexico)
A Cognitive Analysis When the Students Solve Problems  [PDF]
Elena Fabiola Ruiz Ledesma
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.34063
Abstract: The research reported in this paper shows an analysis of the cognitive process of students from the senior technical program on food technology, whom are asked to solve a contextualized event on systems of linear algebraic equations within the context of balance of matter in situations of chemical mixtures. The cognitive analysis is founded on the theories of Conceptual Fields and vents. For the analysis attention is focused on the representations carried out by students regarding the invariants in the schemes that they build when they face an event of contextualized mathematics. During the acting process of students emerge different types of representation which are appropriate to the context in which the research develops, with which a proposal for the classification of them.
Teaching Strategy Using Programming: The Probability Case  [PDF]
Elena Fabiola Ruiz Ledesma, Juan Jesús Gutiérrez García
Open Journal of Applied Sciences (OJAppS) , 2017, DOI: 10.4236/ojapps.2017.79032
Abstract: This document presents the advantages of using different technology and computational programs, in order to support the teacher and the student during the teaching and learning experience regarding the subject of Probability and Statistics, which is taught in upper levels. For the experimental work, a group of 40 students, who studied the third semester at the Computing Advanced Faculty from the Instituto Politécnico Nacional (ESCOM-IPN) was taken as a sample. The form to assess the group was different than usual, because currently not only knowledge was assessed but also the skills on technology were used to program software that allowed calculation through binomial and normal distribution or develop animations that simulated problems expressed in pencil and paper. For a semester, we worked with the group and obtained excellent results. The assessment was supported through a previously created metric.
El caso de Lucina para el estudio de las fracciones en la escuela de adultos
Valdemoros, Marta Elena;Ruiz, Elena Fabiola;
Revista latinoamericana de investigación en matemática educativa , 2008,
Abstract: in a recently concluded exhaustive, qualitative investigation carried out in an evening primary school in mexico city, we follow the case of lucina along with four others. the research alternated the use of natural numbers, fractions and decimals; here we deal exclusively with the semantic and conceptual enrichment of fractions, in the resolution of problems which allow the reconstruction of vital experiences of the subject. the study was made up of an exploratory questionnaire and two didactical interviews with this 41-year-old woman who attends 6th grade elementary school, the interviews being the main source of information of the study. we have selected lucina's case because she has recently returned to school, has shown a solid performance on the questionnaire and a satisfactory level of reflection on the nature of her own development.
Vínculo entre el pensamiento proporcional cualitativo y cuantitativo: el caso de Paulina
Ruiz, Elena;Valdemoros, Marta;
Revista latinoamericana de investigación en matemática educativa , 2006,
Abstract: the case study reported here it is part of a doctoral project already concluded. it refers to the evaluation of the teaching proposal for rate and proportion developed in the doctoral research. this proposal was carried out with a group of students of elementary school constituted by 29 eleven-year-old mexican children. the girl of the case study (paulina) express the behavior of various of these children, who resolved the initial questionnaire with algorithms handled on a mechanical way, without giving sense to its elaborations, which was ratified at the beginning of the teaching program. this program permitted the growth of the qualitative proportional thought of the student, fortifying its quantitative proportional thought, regarding problem solving. thus, the teaching, the final questionnaire and the employed interviews, showed that the enrichment of the qualitative proportional thought permitted to paulina to expand the quantitative relations and to improve the management of the algorithms, framing it in applications full of sense.
Relaciones de género y mercados de derechos de agua y tierra en Chiapas
Laura Elena Ruiz Meza
Región y sociedad , 2012,
Abstract: En este artículo se analizan los elementos de género presentes en los procesos de mercantilización de los derechos agrarios y de agua para regadío en el área de influencia del distrito de riego 101 Cuxtepeques, localizado en la región Frailesca de Chiapas. También se examinan las implicaciones de la instrumentación de las políticas hídricas impulsadas en México, para introducir mecanismos de mercado que incentiven la inversión privada en la reasignación de los derechos al agua y la seguridad en la tenencia de la tierra para las mujeres campesinas. A partir de lo cual se sostiene que, en el marco de las relaciones y estructuras de poder existentes, los mercados de derechos de agua recrean mecanismos de exclusión e inequidad social y de género en los procesos de gestión de los recursos hídricos locales.
CLIMATE CHANGE AND LABOR MIGRATION IN THE MEXICAN SOUTHERN BORDER
LAURA ELENA RUIZ MEZA
Luna Azul , 2012,
Abstract: To the persistent poverty conditions existing in Mexico, manifestations of climate change, whose most significant impact is observed in the agricultural sector and in food sovereignty, are added. In Chiapas, southern Mexico, with the lowest human development index, the disasters caused by extreme weather events in recent years made worse the vulnerability of the population and significantly increased migration flows. Climate change has serious effects on employment and labor markets in the rural sector which is the most affected sector. In the context of the effects caused by climate variability and the crisis in the agricultural sector, the dynamics of migration has become more complex in recent years. This paper shows that international migration has had the border states of southern Mexico as destination, but increasingly they appear as transit regions and origin of migration to the United States of America, interrelated phenomena that have in common increased poverty because of climate change
Género, grupos domésticos y derechos de propiedad sobre la tierra
Laura Elena Ruiz Meza
El Cotidiano , 2006,
Abstract: Las construcciones culturales de masculinidad y feminidad que orientan las pautas culturales en la familia y en la comunidad han jugado un papel significativo en restringir el derecho de las mujeres a la propiedad de la tierra, así como su participación en espacios públicos. Igualmente, la residencia patrilocal tiene implicaciones en la condición y posición de las mujeres al colocarlas en una situación de vulnerabilidad. El reducido poder de negociación que suelen tener en esta etapa de su vida, su posición subordinada en el sistema de parentesco y su limitado acceso a los bienes y recursos se expresan en inequidades de género que afectan notablemente su calidad de vida.
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