Factors Inhibiting Solving the Problems of Concentration in Conjunction with Mathematics in Junior High School and Elementary School

Abstract

The purpose of this study was to investigate the factors that inhibit students’ solving the problems of concentration in junior high school science. We identified eight types of factors; “comprehension of the structure of saline water”, “comprehension of the structure of solution”, “grasp of the formula of concentration of saline water”, “grasp of the formula of concentration”, “ability of converting percentages to decimal numbers”, “computing power of the percentage”, “ability of solving equations”, “ability of the deformation of the formula”. It also became evident that students have six learning stages in order to solve the problems of concentration. Therefore, students become able to solve those problems by achieving the six learning stages.