| | Table of contents
Educ. mat vol.23 no.3 México Dec. 2011 Editorial
| | | |  Articles of investigation | | | | | | · Assessment of learning and mathematical knowledge on viewing three dimensional objects
Gonzato, Margherita; Díaz Godino, Juan; Neto, Teresa
| | | | | | · Argumentative structure of students for mathematics teachers in an online environment
Roig, Ana Isabel; Llinares, Salvador; Penalva, M. C.
| | | | | | · Mathematical models of the Pythagorean tuning system and some of their consequences: a proposal for the classroom
Peralta, Javier
| | | | | | · Some aspects of the development of algebraic thinking: the concept of variable root and second-degree polynomial equations
Ochoviet, Cristina; Oktaç, Asuman
| | | | | Essays | | | | | | · Geometrización de una porción del espacio real
Camacho Ríos, Alberto; Sánchez Luján, Bertha Ivonne; Blanco Vega, Ricardo; Cuevas Acosta, Jesús Humberto
| | | | | | · Stochastic optimal control in the teaching of mathematical economics
Martínez Palacios, Ma. Teresa V.; Venegas-Martínez, Francisco
| | | | | Teaching | | | | | | · Construcciones SERLIST y SERFUNC de series infinitas
Martínez-Planell, Rafael; González, Ana Carmen; Yumet, Gladys Di Cristina; Acevedo, Vanessa
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