I don' t know if the secret will have to do with a dead child. It seems like a heavy topic for a largely comedic show. However, they did open with a suicide, so maybe they would.
After hearing John talk about his algebra and bio classes, I am wondering if he isn't a high schooler, too! That bugs me now because it is SO inappropriate. I thought he was supposed to be in college. I am trying to give it the benefit of the doubt and say he's in COLLEGE level algebra and maybe taking a lower division GE course in bio