As one who works in the public school, I know we can't teach about the knowledge of Christ but we can teach about moral accountability and pray that the tutor of the law will lead them to the salvation of Christ.
Everyone needs to be held accountable for what they do and what they don't do and have honest feedback on those things so they do not leave deceived into thinking they are farther along the path of learning then they actually are. So they can identify their weaknesses so they can learn how to build them up and become strong enough to accomplish the task they set out to achieve and not fail because they did not know their own limitations or were not prepared for the tough spots not so nice things in the mission of life God sets before us.