This is likely a really bad idea, especially since I am an agnostic and don't believe this myself, but if you asked most Christians the question the OP poses this is *probably* the answer you would get.
Histler will NOT go to heaven because you have to make an honest, loving attempt to follow God's laws, not just give lip service to the idea of being a Christian right before you die. Accepting Jesus as your savior requires more than just proclaiming it, especially after a lifetime of committing some of the worst sins possible. Only God/Jesus would be capable of looking into Hitler's heart and knowing if he was truly repentant, even then it might be too late. We don't decide who goes to Heaven, only Jesus/God does can know for sure. Just because someone may or may not seem righteous to us doesn't mean they are in God's eyes.
The school teacher (and all of us unbelievers) will be resurrected and shown, either at death or later (the last will be first and the first will be last) when Jesus comes back to take control of his kingdom on Earth, the truth of the existence of God. We will then know the truth and be given a choice to accept Jesus/God as our savior and live in Heaven for eternity as we were meant to before Adam and Eve sinned and got us all kicked out of Eden. If we/the school teacher insist on rejecting Jesus/God after being show the truth, either we go to Hell or just cease to exist (meaning Hell = not existing in a loving relationship in Heaven with God as we were created to.)
I'm not claiming to believe any of this, but this is more or less what most the common Christian belief. We can debate the existence of God but the way the OP puts common Christian belief is just ignorant. Of course we all know he was just trolling and probably won't even be back.