Girl's education must be primarily focused on the sacred role of motherhood and wifehood. Girls should be trained how to be homemakers and if they do not marry or enter the Religious vocation, they should use their feminine virtues such as caring and nurturing towards the welfare of the community (professions like nursing and teachers come to mind). It is an obligation towards society, but most importantly it is God's will that women honor their sacred role of bringing and nurturing future soldiers of Christ, thus populating Heaven with saints. If not physical mothers, they should somehow be spiritual mothers and servants of God in the community.
There is nothing wrong with women pursuing other intellectual interests, as hobbies, if they so wish it, but this is never to be at the expense of their God's given role (meaning entering the workforce to compete and take away the jobs of men, who really need them in order to provide and protect their wives and children). If for some reason, SINGLE women must enter the workforce outside the home, they should abstain from male dominated professions (constructor workers, truck drivers, soldiers, etc).
It was Our Lady, Blessed Mary who restored womanhood to her proper position. Girls must be truly encouraged to be Mary Like in all their ways, actions, and pursues.