In this research we discuss relating the description of certain harmonic phenomena, with models that represent them, with the goal of promoting the understanding of the period, the frequency, and the amplitude of the trigonometric functions, particularly referring to sinusoidal functions; in this way the frontier between sinusoidal functions and…

This article presents the results of a qualitative research with a group of 15 university students of social sciences on informal inferential reasoning developed in a computer environment on concepts involved in the confidence intervals. The results indicate that students developed a correct reasoning about sampling variability and visualized…

The study of three-dimensional objects is undertaken in the Mexican curriculum throughout all levels of basic education. However, few studies relate to the mathematics knowledge needed to teach those ideas. This report represents an approach to the study of such knowledge. The approach is based on an account, developed from class observations, of…

As a result of scientific and technological developments in today's world, global education has started to take its place in the educational systems throughout the world and become more significant in recent years. Since global education has multiple effects on societies, it is also crucial in helping students to become informed, active, and…

This study (reported in separate English and Spanish versions) used a qualitative approach to identify the supportive parental behaviors of academically successful children from low income families in Even Start programs, from the parents', teachers', and children's perspectives. The sample contained 12 low income parents who had one or more…