We see a lot of that in home schooling families, and not just the religious ones.

My wife was just telling me about a mother we know who started sending her kid to a Chemistry class. The class is taught by a Christian group from a Christian text book. The mother is a scientist by training. She looked through the text book and discovered that, despite God being in the index 12 times, the text itself was extremely accurate and well-written -- this is generally not the case with Christian text books, particularly the science ones.

The mother, who belongs to a secular home school group, is now being ostracized by several of the other members of varying non-Christian beliefs, for "selling out". Never mind that the text and the class are well done and useful.

Personally, we expose our kids to as much as we can, essentially a comparative religion course.