It means that the school is a Christian school, and that prayer is part of the curriculum of the school. In point of fact it is the most important of all the teachings of the school. Whatever else you learn in school it will not get you to heaven, prayer on the other hand will certainly help you along the way.

No. Not in public school at least.

Organized prayer in public school violates the First Amendment Establishment Clause.

Prayer isn't allowed in schools.

for prayer