Chinuch Hora'ah of the Day:
It is understood that this matter [chinuch in the spirit of Yiddishkeit] also applies to girls before marriageable age, for they must prepare to fulfill their primary role when the time comes – to establish a Yiddishe home. Then every one of them will become an akeres habayis and will need to educate the members of her household in the spirit of Yiddishkeit. Therefore, they need to begin [training] in all these matters even before marriage by helping their mothers.
(Hisvaaduyos 5745, vol. 2, p. 1350)