This paper gives a description of an ongoing study focused on pattern exploration and generalization tasks, analysing the performance of fifty-four 6th grade students when solving this type of tasks. The main goal is to understand the strategies they use,…

In this paper we show part of the results of a larger study1 that investigates conditional probability problem solving. In particular, we report on a structure-based method to identify, classify and analyse ternary problems of conditional probability in mathematics textbooks…

José Luis Cuevas emerged in the mid-1950s as an independent artist who refused to subordinate his art to imposed standards and expectations. In his conflict with the artistic establishment he was defended by prominent critics and other artists of like…

Algebra has become a building block for success in mathematics. Our argument in this paper is that, in order to allow students to properly develop their understanding of algebra, solid foundations need to be laid during elementary and junior secondary…

Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous in the environment and may have natural or anthropogenic origin. Most environmental PAHs are products of incompletecombustion or pyrolysis of fossil fuels and can be introduced into the soil via atmospheric deposition. PAHs are…

There are a number of medicinally active phytochemicals isolated from hawthorn with most of the data generated in studies of those species that are native to Europe and Asia. Comparatively little is known about the North American, specifically the Mexican…

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