Applying the Aptitude Treatment Interaction (ATI) learning model in mathematics learning to improve mathematical concept understanding of 5th grade of elementary school students

Abstract

This paper aims to describe the application of the Aptitude Treatment Interaction (ATI) model in mathematics learning that is reviewed from students' understanding in mathematical concept. This research is a pre-experimentation study using the one-group pretests posttest design and involved 30 students in the grade V of elementary school in Pangkep District as a sample. Data obtained using a test instrument of mathematical concepts understanding in fractional material. Furthermore the obtained data is analyzed using a descriptive analysis to see the improvement in the understanding of mathematical concepts of students by using gain index. The results showed that the average student pretests was acquired by 55.61 which was in sufficient categories, while the average student posttest score of 81.90 was in a very good category. The gain index calculation result is obtained at 0.59 which is in medium category. This indicates that the application of the Aptitude Treatment Interaction (ATI) learning model can improve the understanding of students' mathematical concepts.