labochur, I don’t have it clear either. I’m also a balabos not a poseik, meaning my opinion counts for nothing- ask your local Orthodox Rabbi, which I am not.
Rav Zalmon Sorotzkin, in a sefer so obscure I can’t hunt it down, says that you can teach them maskanos. It sounds like torah shebaal peh, but more than dinim (which are muttar according all). But I want to see it inside.
All agree women are allowed to learn whatever they want on their own- Prisha on the tur based on the Rambam.
Most seminaries do not allow gemara but do allow Ramban on chumash. Again, this sounds like Torah shebaal peh, and it’s a stretch to read that into the Chofetz chaim’s likutei halachos. One of my learned friends in klei kodesh claims that the Ramban is part of yiras shomayim, which is muttar, and gemara isn’t. I don’t hear it, but it must be what the seminaries are following, unless there is another heter I’m not aware of.