RT Journal Article T1 Specialised Knowledge for Teaching Geometry in a Primary Education Class: Analysis from the Knowledge Mobilized by a Teacher and the Knowledge Evoked in the Researcher A1 Liñán García, María Mar A1 Muñoz Catalán, María Cinta A1 Contreras González, Luis Carlos A1 Barrera Castarnado, Víctor Javier AB Deepening the specialised knowledge of mathematics teachers is necessary for teaching, and it is one of our concerns as researchers; accordingly, in this study we analyze the knowledge that a teacher mobilizes when giving a first lesson on geometry to a class of fifth year of primary education at a Spanish school. We provide this analysis with a complementary perspective that leads us to broaden our focus of attention to other aspects of classroom management, thus identifying the specialised knowledge evoked in the researcher by the opportunities observed in the classroom. We take opportunities to mean classroom situations that occur as a result of the teacher’s management for which the researcher considers that an alternative management of such situations would be supported by relevant specialised knowledge for the teaching of the given content. Considering the possible alternative management of specific classroom situations makes this specialised knowledge emerge, which, together with that mobilized by the teacher, generates specialised knowledge useful for guiding the content of the training of primary education teachers. PB MDPI SN 2227-7390 (electrónico) YR 2022 FD 2022 LK http://hdl.handle.net/10272/21269 UL http://hdl.handle.net/10272/21269 LA eng NO Liñán-García, M.d.M.; Muñoz-Catalán, M.C.; Contreras, L.C.; Barrera-Castarnado, V.J. Specialised Knowledge for Teaching Geometry in a Primary Education Class: Analysis from the Knowledge Mobilized by a Teacher and the Knowledge Evoked in the Researcher. Mathematics 2021, 9, 2805. https://doi.org/10.3390/math9212805 NO Work supported by the CEU Cardenal Spínola Centre for University Studies, Seville, Spain,and the University of Seville, Spain. DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026