In Expressions^x, Countable nouns^x, American English^x

Hello Anon I'm a mere English learner from Japan and my role here is rather an asker than an answerer. But if you don't mind, I'd like you to read my ideas about your question. I take "school" in "go to school" or "church" in "go to church" as an uncountable noun. As you suggested, "school"...