Tur (Yoreh Deah 246:15): Most women’s minds are not geared toward being taught, but if she had begun to study properly herself, not making Torah into foolishness, she is no longer like most women and she is rewarded…
Sefer Hachasidim: One should teach his daughters practical law – not because there is a requirement for them to learn, but so that they should know the laws. Once they know the laws, there is no need for them to learn any more.
Aruch Hashulchan: We have never taught women from a sefer, nor have we ever heard people actually do so. Rather every mother teaches her daughter well-known rules women should know.
Torah Temimah: Girls do not have the intellectual stability and are, therefore, unable to make profound inquries with a sharp mind and appreciate the depth of the Torah. It is possible thay by using their own minds, they will transgress the Torah.