grouping
/ˈgruːpɪŋ/noun
1- a set of people acting together with a common interest or purpose, especially within a larger organization（尤指大团体中的）派, 集团：
a grouping of left-wing trade union leaders.
由左翼工会领导人组成的派系。
1.1
- mass noun the arrangement or formation of people or things in a group or groups分组; 分类：
an alternative form of ability grouping.
按能力分组的一种变通的形式。