First you don’t force the Gospel down anyone’s throat.  The wonderful thing about Christianity is that it is a choice we must all make to ask Jesus into our heart or not to. She is your teacher and as her student and a Christian you must be obedient to her. Unless she asks you to go against God or the Word.  What I would do is tell her and the class up front that I am going to make this presentation according to the guidelines my teacher has given to me.  It won’t be what I believe because in this class I cannot state my beliefs.  So here is what the majority thinks and I would give her a debate about the death penalty in the world.  I would do a conservative view VS a liberal view.  If she asks you what you mean by your comment she has opened to door so that by law you can answer.  I hope this helps you.  God bless your sweet heart!!! :):):)