Where does T'Challas sister learn science from

But from hints in the film the way she calls the white guy a colonizer and the fact T'Challa prevents her coming with him when he goes abroad suggests she hasnt been outside wakanda and never intetacted with white people there.

The only good reason ive got is from politicidal, that other elders who travel outside Wakanda go to other countries and pass on their education to young Wakandans.