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Age segregation in schools, age grading, or graded education is the separation of students into years of education (grades, forms) by approximately the same age. In the United States, graded education was introduced during 1848 to 1870.〔Frederick Dean McClusky, ''Introduction of Grading into the Public Schools of New England, Part II'',The Elementary School Journal, Vol. 21, No. 2 (Oct., 1920), pp. 132-145〕 Age grading in schools has significant impact on age segregation among adolescent peer groups.〔(SpringerLink - Journal Article )〕 ==See also== *Multi-age classroom *Ungraded school *Sudbury schools, schools that are completely age-mixed from age 4 through high school. No age-groupings. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「age segregation in schools」の詳細全文を読む スポンサード リンク
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