The word "schooling" gets a small scowl out of Rail, the same kind of expression a child might wear if someone told them to "eat their vegetables." She didn't want to learn. It probably meant having to study a bunch of science stuff and reading books that she couldn't understand. Neither one sounded appealing.

"Ugh, forget it. I'm not that interested in finding out if I gotta go read a book on it or something. Actually, I'm not interested at all."

Despite being the one pointing it out to Toriel in the first place. There's a little bit of a huffiness to Rail's tone before she attempts to change the subject. This lady probably likes reading a bunch of boring educational books.

"So you made it out of that whole mess from earlier, huh?"