multigrade
adjective mainly US (also multi-grade) uk/ˌmʌl.tiˈɡreɪd/ us/ˌmʌl.tiˈɡreɪd/ /ˌmʌl.taɪˈɡreɪd/
（学生）多个年级的
involving students from more than one grade (= a school class of children of a similar age or ability)
Rural teachers often have to teach multigrade classes. 乡村教师经常不得不教授多个年级的课程。
- More examples
- The school has one kindergarten class and two multigrade classes with a total of three teachers.
- This was a multigrade class with a wider range of achievement levels than exists in most classrooms.
- Teachers have to cope with multi-grade classes with little in the way of materials and books.