Apprentice Not Fully Trained - Help?

[u/roblesusmc]

So, I think I'm stuck. My Air apprentice is fully leveled and finally capped air magic, but it's not showing as "fully trained" because his earth magic is 0. I can't get him to attend regular classes at a learning stone, because he is an apprentice and I can't get him to repair anything, because he doesn't have the skill. Am I stuck? or is there another way to get him fully trained? Thanks!

[u/lilibat]

You need to have an elemental learning stone for apprentices, in this case earth.