That One Fool asks:

Besides being a medic what else dose Kix teach you like math or science?
(Basically school subjects)

Sis: Well, I'm not sure if he teaches me everything people would learn in school, but he does teach me other things other than medicine. Like science and even a bit geography, I suppose, as well as some self-defense, we are in an army after all. But to be honest, before I joined him, Afan Te trained me in fighting and weapons, not in the best way, but I still learned.

Sis gently rubs the side of neck.

But to answer your question, Kix does teach me other things than just how to be a medic.