[@Hopeless Swan]

Hm. To put it simply I was thinking along the lines of fleshing out the school/academy with a higher population by including demi-children, or perhaps even full blooded students from other mystical species. There is much lore revolving around other creatures with the sort of abilities you're going for; There are giants who have an affinity with the elements, Nymphs and Satyrs attuned with nature, and so forth. Perhaps, if it wouldn't pollute your primary concept too much, it could be a school for the demi-gifted and mystical. I feel that if demi-gods exist, then so must the other creatures. But, if it's too far from the main point, I'll happily assume that all those other little creature kids go to a different school.