I can't think of a better way to introduce students to Christianity than to invite them to read the Gospels with care and to ask all the tough questions. . . . Dealing with the tough questions is a lifelong business, and the most important educational point is not to try to spoonfeed students with oversimplified answers that won't stand the tests of time and experience. Faith is not something some people have and others don't. Faith also isn't something opposed to reason. Faith is something that everybody needs to get started in any direction, and to keep going in the face of discouragement.
Reason builds on a foundation of faith.
A faith that has to be protected behind walls is like a house built on sand. When the protection ceases, the faith collapses. Faith is confirmed by testing and validated by struggle in a world that gives a multitude of reasons for doubt. When people are taught for years on end that good thinking is naturalistic thinking, and that bringing God into the picture only leads to confusion and error, they have to be pretty dense not to get the point that God must be an illusion. This doesn't necessarily mean that they become atheists, but they are likely to think about God in a naturalistic way, as an idea in the human mind rather than as a reality that nobody can afford to ignore.