The students studying the teacher training course had visited the child development support facility. They had replied the semantic differential method tests about their images of disability three times. The first test was checked before the visiting, the second was immediately after the visiting, and the third was two months after of the visiting. These tests were run for the purpose of class assessment. The second test increased the favorability rating of disability. And some students decreased extremely the favorability rating of disability at the third test. The mutability of student's evaluation has been considered. The students who have the concern for another student's thinking or feel sympathy for person didn't decrease their evaluation at the third test. It is necessary that the class should improve the interest in classmate’s thinking.