Quiet Calling: More than 50 million children attend public elementary and secondary schools in the United States, according to the National Center for Educational Statistics. That means roughly 90 percent of K-12 students spend their most impressionable years in an environment that is largely hostile to Christianity. A gathering sponsored by Biola University, Azusa Pacific University, and Christian Education Association International (CEAI) hoped to change that by empowering educators in public schools who are Christians.