Zamorano Urrutia, FranciscoCortés Loyola, CatalinaHerrera Marín, Mauricio2020-01-032020-01-032019International Journal of Emerging Technologies in Learning, 2019, Vol 14, No 23http://hdl.handle.net/11447/2995In mathematics education, studies reveal difficulties in the teaching-learning of trigonometry in secondary and higher education, due to the fact that students are not encouraged to achieve a deep conceptual understanding of abstract concepts. Several studies demonstrate that incorporating digital technologies has a positive impact on students’ learning. However, most of the existing technologies do not consider the use of the body and multiple senses. Tangible User Interfaces (TUIs) in contrast, can host bodily interactions that have the potential of enhancing learning. Nonetheless, there is a lack of applications of TUIs for trigonometry education. This study consisted of designing and validating a tangible interface for the teaching-learning of basic concepts of trigonometry. The interface hosts a pedagogical experience that privileges exploration through physical manipulation and fosters intuitive and collaborative learning. A Pre-Test was applied to 121 students to determine previous knowledge, yielding a 29.1% performance. After two sessions using the interface, the results of a Post-Test reveal an increase of 37.1%, confirming the edu- cational effectiveness of the interface and the pedagogical experience to facilitate learning of basic concepts of trigonometry.13 p.enDesignCollaborative learningTangible User InterfacesInteractionTrigonometry