Abstract
The purpose of this study is to show how students can enhance
mathematical creativity. Flexibility is an important factor for creative problem
solving. However, in the lesson of the present school mathematics, students’ flexible
thinking is hardly used. We found that the inhibitory factor of students’ flexible idea.
We analyzed the influence of fixation of a solution by using the problem of
constructing a perpendicular bisector. We focused on the relationship between the
intelligibility of learning contents and exertion of mathematical creativity. Students
had the tendency to memorize a solution without understanding the mathematical
background. We made a problem for overcoming students’ flexible thinking. When
students used that problem, they were able to consider various solutions than the
usual problem.