Epistemological obstacle is emphasized in mathematics education. Students often have
limited students' context of knowledge in understanding trigonometry. Knowing the …

Making connections between the representations of trigonometric functions and an
interpretation of graphs of the functions are major challenges to many students. This study …

Trigonometry is one of the branches in Mathematics that is considered difficult to learn by
most of the students. One of the learning activities is drawing a graph of a Trigonometric …

Learning barriers are difficulties, obstacles, and everything that can slow or even frustrate
students in achieving learning goals. In learning mathematics, most students experience …

This study explored grade 12 learners' graphical efficacy when solving problems involving
trigonometric graphs. A structured test consisting of five trigonometric problems, with …

Introduction. One of the most well-known theories that allows us to study the process of
structuring a concept in the mind of a student is the APOS theory, specially created for the …

Введение. Теория APOS–одна из наиболее известных теорий, позволяющая изучать
процесс структуризации понятия в сознании студента, созданная для исследования …

Teachers and students have different ideas and expectations about the didactical situation
that evolves in the classroom. It needs rules that determine teachers' and students' unique …

The inverse function in secondary schools is still a difficult concept to learn. Meanwhile, in
national exams or competitions this problem often arises. Didactic design is an attempt to …

This study is aimed to identify epistemological obstacles in students' understanding of the
concept of analytic trigonometry. This research used Didactical Design Research (DDR) as …