According to Jeremy Uecker’s article, “Alternative Schooling Strategies and the Religious Lives of American Adolescents,” published in the December 2008 issue of the Journal for the Scientific Study of Religion.
. . . At best, schooling has a limited effectiveness on student religiosity. Parents and friends, however, strongly affect each aspect of religious life in the study. Students who have more religious parents and friends are more likely to attend church, Sunday school, and church youth group. They are also more likely to consider religion more important to their lives and to have private devotions (praying and reading the Bible on their own).
The good news for parents is that while the choice of schooling is important, the most effective thing they can do to affect the religious life of their children is to take their own spiritual life seriously and to encourage their children to build friendships with peers who are also faithful Christians. . .