Pre-service teachers need a good understanding of proportion concept so that later they can
become teachers who can understand the concepts of mathematics to pre-service teachers …

The ratio and proportion is one of the basic concepts in mathematics. This concept is not
only used to solve problems in mathematics but also in other disciplines and in daily lives …

This study intends to investigate how students' understanding of ratio and proportion
concept indicates epistemological obstacles. It was part of Didactical Design Research …

Many studies reported that the students lack understanding on the topic of ratio and
proportion. This topic basically becomes a cornerstone for understanding the other …

Ratio and proportion are mathematics topics that are learned in elementary school. In the
learning process, teachers often found students who have difficulties in learning these …

In order to achieve learning objectives optimally, learning is designed with attention to
students' learning obstacles. The purpose of this research was to analyze the obstacles of …

The purpose of this study is to describe the process of students' proportional reasoning in
solving missing value problem. Therefore, this study classified as descriptive qualitative …

A linear equation is an algebra material that exists in junior high school to university. It is a
very important material for students in order to learn more advanced mathematics topics …

This research was qualitative that aims to described the quantitative reasoning and students'
generalization ability in direct proportion. This research involved 35 grade VIII junior high …

This research aims to describe the mathematical communication skills of class VIII students,
as well as the mistakes made by students in solving answers to the two-variable linear …