If the church isn't within convenient walking distance of the school, I'm certain the school has a bus that transports sudents to the neighborhood where the church is located. And arrengements can be made among the parents to pick 'em up afterwards. If that is too "inconvenient", than I doubt that the parents have much interest in their child's religious training anyway.
You continue to practice diversion in order to avoid the issue.
If a Republican student organization wants to hold an after-school meeting, would you force the school bus them to, say, the local Knights of Columbus clubhouse?
If an environmental activist student organization wants to hold an after-school meeting, would you force the school ot bus them to the nearest meadow?
If an atheist student organization wants to hold an after-school meeting, where would you propose they be bussed?