Do they offer some kind of numerical analysis class cross-listed with the mathematics department? This is a class I wish I would have picked up. I now have to

Do they offer some kind of numerical analysis class cross-listed with the mathematics department? This is a class I wish I would have picked up. I now have to teach myself numerical analysis, and there is so much material to choose from that I don't know what the correct sequence of learning things should be. My methodology is diving into GSL and picking things apart until I come to something I don't understand. Then I go and research that. Then I start picking more apart. I'm sure a lot of my headaches could be prevented if I were learning things in a "proper" order.