Teaching in the Demon Realm

Qin Shan transmigrated into a book, landing in a xianxia novel as a cannon-fodder supporting female character who died young.

She successfully used her wicked schemes to ruin the lives of several heaven-favored geniuses.

But can someone tell her why she has become a teacher admired by everyone, educating a whole bunch of exceptionally studious students?

Theme: Self-reliance