There is a Reason it is called OLD Testament. It is B.C. or Before Christ. The "stories" in the Old book is just that "stories" that Modern Christians use to teach their kids what is wrong, and the NEW Testament is there to teach us what is Right. Basically MORALS. In my Theology class in college, we were taught that just about ALL religions came from the OLD Testament, but those religions that are running the "hatred" of the world are still based on that, *Cough* Quaran *Cough*...
Point is, Teach the New Testament along with the Old, and you have a basis for a morally good person. Teach only Old, you have the entire Middle East, teach neither and you have the sum of the scum of America today...