Alina Galvão Spinillo is a Full-Professor in the Post-Graduate Program in Cognitive Psychology at the Federal University of Pernambuco, Brazil. She is also one of the leaders of the Group for Research in Psychology of Mathematics Education at the same university. She is a member of the Working Group Sociocognitive and Language Development of the National Association for Research and Post-Graduate Programs in Psychology, Brazil, and a member of the Working Group Cognitive and Linguistic Processes in Mathematics Education of the Brazilian Society of Mathematics Education. She is a level 1 researcher with the National Council for Scientific and Technological Development. She has carried out studies and publications on mathematics reasoning, literacy, writing and text comprehension in elementary school children.

Carmen Sotomayor is a Full-Professor in the Institute of Advanced Studies in Education at the University of Chile. She coordinates the area of ??Language Teaching and Learning at this institution, and she trains primary education teachers at the same university. She is a member of the Chilean Association of Researchers in Education, and a member of the SIG Writing, Special Interest Group, of the European Association for Research in Learning and Instruction (EARLI). She is a consultant for the Ministry of Education in projects on learning standards and teacher training in Language and for UNESCO in the curricular analysis for the ERCE reading and writing tests for Latin America. She has carried out studies and publications on writing in primary school, including the use of technology for teaching writing.