A world doesn't need to be very "modern" for its education system to suck.

[Eren sounds extremely bitter about that. His world has basically screwed him over in terms of both technology and general education.]

In training to be soldiers they taught us to read and write decently enough, and what math we'd need to do our jobs. What other things did you have in mind? I've learned a little science from a book Armin has and Thorne taught me about evolution. I wouldn't mind learning more about that kind of stuff. ...As long as these classes won't just be for kids, anyway.