Yeah sure, but wouldn't it be more understandable if when hovering on 'i' it would say "in" instead of ("you (plural)", "you", "of"). Because with it people may think that is says: "What do you you teach?"
Sorry. I worded my question incorrectly. Where is the word "subject" in that sentence?
'What do you teach' is also accepted. The word 'subject' doesn't appear as such.