The Pledge of Allegiance is a promise or oath of allegiance to the United States, and to its national flag. It is commonly recited in unison at public events, and especially in public school classrooms, where the Pledge is often a morning ritual. In its present form, the words of the Pledge are:

I pledge allegiance to the flag of the United States of America, and to The Republic for which it stands, one Nation under God, indivisible, with liberty and justice for all.

According to current U.S. custom, as codified by the United States Congress, persons are expected (but not legally required) to recite the Pledge as follows:
By standing at attention facing the flag with the right hand over the heart. When not in uniform men should remove their headdress with their right hand and hold it at the left shoulder, the hand being over the heart. Persons in uniform should remain silent, face the flag, and render either a scout salute or the military salute. Some US states, such as Texas, also have pledges of allegiance to their state flags.