Education/Indoctrination

On Monday we discussed several ethical issues surrounding tutoring, and much of our discussion revolved around the ethics of tutor bias. I'm interested in seeing what you all think about where the line is between education and indoctrination (political, moral, ethical, etc.). Where does education leave off and indoctrination begin? Is there even a difference between the two? How do we know which is which? Have you run into this dilemma in your tutoring?