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Copyright of Archivos de Ciencias de la Educacion is the property of Universidad Nacional de La Plata and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Using the classification methods for mathematical problems in textbooks (Fan & Zhu, 2000) and strategies used to solve problems (Fan & Zhu, 2007), this paper reports the results of an analysis and classification of the type of mathematical problems and problem-solving strategies in a sample made up of the five most widely-used mathematics textbooks for the first year of junior high school in the 2013- 2014 school year in Mexico. It is concluded that the textbooks focus on providing a comprehensive range of problems that, for the most part, do not allow multiple problem-solving strategies, whereas others can be solved using an algorithm or direct procedure. [ABSTRACT FROM AUTHOR]

Copyright of Human Review is the property of Eagora Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Leon city has a growing concern about the problem of water, which is polluted mainly by the tannery industries, shoe manufacturers and agroindustries. By law, environmental authorities have asked each polluter to abate pollution, but the task has gone to no avail. The purpose of this paper is to prove that the problem has a solution. To find it, it was built a non-linear-dynamic program starting from the traditionally used treatment processes to clean the waste currents as a solution for a new strategy for a lower cost which shares among the emitters using analytical ranking. [ABSTRACT FROM AUTHOR]

This paper reconstructs some findings of the project "Common arithmetic knowledge and productive and social practices"; the questions which direct it are: What sort of number and calculus problems its productive and social insertion poses to these organizations? IA/hat are the social worries that support the strategies in the solving of arithmetic problems? The empirical referent is constructed through the perspective of two women who lead two productive organizations (in Mexico and Argentina) of self-management linked to craft production. Some analytical advances referred to Mexico (Purepecha indigenous community) are reported. In particular, the uses of numeracy and their links to the community social criteria of extra mathematical order that underlie and cross different situations which are framed not in an individual action, but in a collective one. These criteria rule two kinds of relations: the inner ones and the outer ones, crossed by the concerns around power (the nice power) and the defence (to face the outside) of the organization. The reconstructing of these senses implies a positioning that redefines the polarity literacy! illiteracy, by asking how one can learn to read or write numbers under such circumstances, when the knowledge of the number writings is limited. [ABSTRACT FROM AUTHOR]

The scientific productivity of the Instituto de Investigaciones en Matemáticas Aplicadas y en Sistemas (Mexico) researchers is analysed, showing a panorama of the countries and journals where their papers were published, as well as the different disciplines in which this Institute is involved, according to the ISI classification. [ABSTRACT FROM AUTHOR]

This paper reports a research about a group of in-service teachers working in primary public schools in a poor urban zone in Monterrey city, Mexico. Its main aim was to study teachers' conceptions about the teaching of subtraction and, in particular, to know more about the role that they assign to context and contextualizing in the teaching process. Broadly speaking, the research arose from the interest to know more about the relationship between the training and education in mathematics of primary teachers and how the teaching and learning of mathematics actually takes place at school. [ABSTRACT FROM AUTHOR]