But my mother says a teacher has to be adjusted to fit the mind of each boy and girl it teaches and that each kid has to be taught differently.

【翻译】但我母亲说，老师必须调整自己以适应所教的每一个男孩和女孩的想法，每个孩子都必须接受不同的教育。

1. be adjusted：可以看作系表结构，其中adjusted视为形容词。此外，还可以看作被动语态。主动语态时，adjust的宾语为主语的反身代词 himself or herself，例如：

a teacher has to adjust himself or herself to fit...

2. to fit the mind of each boy and girl it teaches，不定式作目的状语。