抄録
In this research, the reality of junior high school students' memory of the notion of decomposer was investigated. I also investigated the memory which the junior high school student acquired whether was influenced by the teacher's knowledge and the textbook. As a result, the following was clarified. (1) Memory of the notion of decomposer is not acquired by many junior high school students. (2) There are science teachers who do not understand the decomposer properly. (3) The intellectual skills of the teachers' "classification" influences intellectual skills of junior high school students' "classification". (4) Junior high school students' intellectual skills might be influenced not only by the teachers' intellectual skills, but also the textbook and preconceptions. (5) Teachesr themselves, from the learning experience of the junior high school day confusion is seen in the description of the notion of decomposer through the textbook introduced for the first time in 1975's.
