Periodically, schools will hold Mass and most of the elementary and high schools participate. Children help put the liturgy together, celebrate the Mass and present the gifts. It's a big tradition. Most Catholic schools say prayers before class. That's very much a part of the faith and values part of the schools.
Most Catholic schools have a religious education class for all grade levels.
In the elementary schools, it's every day. In high schools they take a quarter or a semester of religion. Catholic schools emphasize religious vocations on career days. It's one of the ways to recruit future priests. No matter what the subject, Catholic school teachers try to bring values into everything they teach.