"Bakersfield Elementary" is just a made-up proper noun for any specific school.
I've read posts on "in school" or "at school". But those don't seem to help me.
ChatGPT 3.5 says:
No, it's not natural to say "Lily is in Bakersfield Elementary" when you mean she goes to that school. A more natural way to express it would be to say "Lily attends Bakersfield Elementary" or "Lily goes to Bakersfield Elementary."
I get the "go to" and "attend" usage here. I am just curious if "in + a certain school" can mean the same thing.