| Table of contents Educ. mat. vol.32 n.2 Ciudad de México Aug. 2020 Editorial | | | | · Ayudar y documentar durante esta pandemia de COVID-19 Sánchez Aguilar, Mario
| | | Research articles | | | | · Pedagogical Content Knowledge: Theoretical and methodological bases for its characterization as an element of a mathematics teacher’s specialised knowledge Escudero-Ávila, Dinazar Isabel; Carrillo Yáñez, José
| | | | · Some key elements of the mathematics teacher’s specialised knowledge for the management of area-perimeter relationships Cayo Maturana, Hugo Cesar; Contreras González, Luis Carlos
| | | | · Evaluative practices and meanings evaluated by the Mexican high school teachers on the notion of linear equation Ramírez Escobar, Raúl Alonso; Ibarra Olmos, Silvia Elena; Pino-Fan, Luis Roberto
| | | | · Professed and implicit mathematical beliefs of university mathematics teachers Hernández Moreno, Antonia; Arellano García, Yuridia; Martínez Sierra, Gustavo
| | | | · Working Memory, math anxiety and arithmetic skills in elementary education preservice teachers Esquivel-Gámez, Ismael; Barrios-Martínez, Flora Lilia; Gálvez-Buenfil, Karina Estela
| | | | · Computational estimation: A study with 5th grade primary students Stauffer, Sandra; Solares, Diana; Broitman, Claudia
| | | | · Constructions and valorization of the culture through ajurí in indigenous school education Mattos, Sandra Maria Nascimento de; Mattos, José Roberto Linhares de; Silva, Enilza Rosas da
| | | | · Statistical thinking development in superior level students through one educative experience Callejo-Canal, Diana Del; Canal-Martínez, Margarita; Hákim-Krayem, Mónica Rubiette
| | | | · Qualitative analysis of early statistical learning with the perspective of mathematical working spaces oriented by the research cycle Vidal-Szabó, Pedro; Kuzniak, Alain; Estrella, Soledad; Montoya, Elizabeth
| | | | · Knowledge of statistical tables by Chilean students third year of primary education Díaz-Levicoy, Danilo; Morales, Rodolfo; Arteaga, Pedro; López-Martín, María del Mar
| | | In memoriam | | | | · José Marcos López Mojica: un inesperado adiós y un recuerdo permanente Ake, Lilia P.; García González, María S; Ojeda Salazar, Ana María
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