Biology.
Chemistry.

Sciences.

-Might as well make them sub-subjects of Sciences.
-Same goes for Astrology being a sub-subject of Divination.
-Phys Ed usually includes first aid and practical medicinal health stuff in most places, so Medicine can be merged into that since it's not a proper MBBS kind of course.
-What the hecc is Eloquence?
---Fashion seems like it'd be a good thing to merge into that
-Cooking and Potions could probably go under one Culinary Arts subject, because you'd learn similar principles in both.
-Ciphers seems like it'd be a sub-subject of Technology.

Generally, the best thing to do with subjects (from all the systems I've been in) is to just have main overarching subjects with specialisations and optional topics within them. Cause then you can apply some interdisciplinary knowledge but also have your own unique set of specialisations.