School prayer, in the context of religious liberty, is state-sanctioned or mandatory prayer by students in public schools. Depending on the country and the type of school, state-sponsored prayer may be required, permitted, or prohibited. The United Kingdom requires daily worship by law, but does not enforce it. Countries which prohibit or limit school prayer often differ in their reasons for doing so. In the United States, school prayer cannot be required of students in accordance with the Establishment Clause of the First Amendment to the United States Constitution. This is generally rigorously applied in public schools; the Establishment Clause does not prevent prayer in private schools that have no public funding. In Canada, school-sponsored prayer is disallowed under the concept of freedom of conscience as outlined in the Canadian Charter on Rights & Fundamental Freedoms. School-sponsored prayer is disallowed in France as a byproduct of its status as a secular nation.

A moment of silence is a period of silent contemplation, prayer, reflection, or meditation. Similar to flying a flag at half-mast, a moment of silence is often a gesture of respect, particularly in mourning for those who have died recently, or as part of a tragic historical event, such as Remembrance Day.