I have a sentence.
Mi clase está en el edificio A.
My teacher says I should use es because I'm describing the location of an event. But, I disagree. If you look at this in English, which I think is safe to do for this case, you get
My class is in Building A.
This isn't describing the location of an event, it's simply describing the physical location of the class. Now, if you say
My class takes place in Building A.
Then, I could see what he is saying.
What do you guys think?