How can the rights of children, whose education I neglected while working as a teacher in a remote area, be restored, especially after leaving the job and emigrating to a land of disbelief?

For children, repentance for the sin and a sincere resolve not to return to it are sufficient. As for the money taken as wages for work not performed, it is not permissible to keep, and one must try to return it to its rightful owner; otherwise, it must be given entirely as charity to the poor. One should also increase acts of obedience and good deeds that erase evil deeds. Furthermore, emigration from lands of disbelief is obligatory for anyone who fears deviation for themselves or their children, and whoever gives up something for the sake of Allah, Allah will compensate them with something better.