Here is a different way to solve this issue without having to convince so many people to send their children to PS. Today their are so many faculty members in the PS system that are orthodox, they give off Yom Tov as a holiday because so many teachers take vacation then. If the Rabbonim would ask all of these faculty members to give up their jobs, while at the same time convincing the Yeshiva’s to hire them or to convince the gevirim to sponsor them. I believe the PS system could not afford to lose so many people, especially with a shortage of good and qualified teachers. This would force their hand to give in.