小中高校のPT比(教員一人あたり児童生徒数)の要因分解 : 戦後における学校・学級規模との関連の動態
Decomposition of PT-ratio of Japanese Schools : Changing relationship of PT-ratio with school and class size since 1948
PT-ratio in schools has been decreased: from 38.2 (1948) to 16.5 (2012) in primary schools. The changes of PT-ratio depended on that of number of students. PT-ratio was decomposed into school and class size components as follows:
PT-ratio = number of students/number of teachers
= students/class * class/school * school/teachers
= class size * school size (n of class)/school size (n of teachers).
The relationships among PT-ratio, class size and school size were examined in primary, junior high and high schools. At first, improvement of PT-ratio was closely related to the improvement of class size in primary and junior high schools. Secondly, it was closely related to the improvement of school size (n of class) in high schools. Thirdly, a unique phenomenon was found in recent several years: school size (n of class) increased in spite of the decrease of number of students. It is considered that many local governments began consolidation of small schools on the aware that the reduction of number of students would be a long trend in their community.
広島大学大学院教育学研究科紀要. 第三部, 教育人間科学関連領域