TY - THES A3 - Arce Sánchez, Matías A3 - Pecharromán Gómez, Cristina A3 - Ortega del Rincón, Tomás AU - Musonda, Thomas Mwenya PY - 2017 UR - http://uvadoc.uva.es/handle/10324/23175 AB - In most cases, teacher-centered methods in Zambia fall short of performance and motivation of the students in teaching and learning of mathematics. Specially in the topic of trigonometric ratios where students fail to interprete the symbols and their... LA - eng KW - Trigonometric ratios TI - Designing a theoretical proposal using problem–based learning to improve learning of trigonometric ratios among grade eleven students M3 - info:eu-repo/semantics/masterThesis ER -