What is our religious duty towards a female teacher in a mosque who commits unlawful acts such as embezzlement and inappropriate treatment of students, exploiting her position, and is it obligatory for us to leave the place or what?

Education is an honor and an act of worship, especially if it is teaching the Quran within one of the houses of Allah. A qualified female teacher should be a role model in ethics and Sunnah. If the aforementioned teacher possesses these negative characteristics, efforts must be made to remove her by all means, and official authorities should be informed if she does not respond, because what she is doing—namely, reprehensible acts and embezzlement—must be changed. It is not advisable for students to withdraw from their studies; rather, they should continue and strive to replace the teacher with another beneficial one. If her removal is difficult and there is concern for the female students because of her, then there is no harm in transferring them temporarily to another location.