Mr. K., a 63 year old, introduced me to his daughter-in-law.
Mr. K.: She's in Medical School.
Me: That's great.
Daughter-in law (wearing scrubs): It's hard but I'm really enjoying it.
Me: Where do you go?
She told me.
It was a local Nursing Assistant School.
Me: That's great, congratulations, I hope everything will continue to go well.
Mr. K. was correct...she was in a School, studying Medicine.
He's obviously very proud of her.
There was absolutely no reason or need to correct his usage of the term "Medical School."