The National Council of the Churches of Christ in the USA (usually identified as National Council of Churches or NCC) is an ecumenical

Ecumenism

Ecumenism or oecumenism mainly refers to initiatives aimed at greater Christian unity or cooperation. It is used predominantly by and with reference to Christian denominations and Christian Churches separated by doctrine, history, and practice...

 partnership of 37 Christian

Christian

A Christian is a person who adheres to Christianity, an Abrahamic, monotheistic religion based on the life and teachings of Jesus of Nazareth as recorded in the Canonical gospels and the letters of the New Testament...

 faith groups in the United States. Its member denominations, churches, conventions, and archdioceses include Mainline Protestant, Orthodox

Eastern Orthodox Church

The Orthodox Church, officially called the Orthodox Catholic Church and commonly referred to as the Eastern Orthodox Church, is the second largest Christian denomination in the world, with an estimated 300 million adherents mainly in the countries of Belarus, Bulgaria, Cyprus, Georgia, Greece,...

, African American, Evangelical

Evangelicalism

Evangelicalism is a Protestant Christian movement which began in Great Britain in the 1730s and gained popularity in the United States during the series of Great Awakenings of the 18th and 19th century.Its key commitments are:...

, and historic peace churches

Peace churches

Peace churches are Christian churches, groups or communities advocating Christian pacifism. The term historic peace churches refers specifically only to three church groups among pacifist churches: Church of the Brethren, Mennonites including the Amish, and Religious Society of Friends and has...

. Together, they encompass 100,000 local congregations and 45 million adherents.
The NCC holds the copyright on the Revised Standard Version

Revised Standard Version

The Revised Standard Version is an English translation of the Bible published in the mid-20th century. It traces its history to William Tyndale's New Testament translation of 1525. The RSV is an authorized revision of the American Standard Version of 1901...

 and the New Revised Standard Version

New Revised Standard Version

The New Revised Standard Version of the Bible is an English translation of the Bible released in 1989 in the USA. It is a thorough revision of the Revised Standard Version .There are three editions of the NRSV:...

 of the Bible

Bible

The Bible refers to any one of the collections of the primary religious texts of Judaism and Christianity. There is no common version of the Bible, as the individual books , their contents and their order vary among denominations...

.

The NCC sponsors the research program on which the Uniform Sunday School Lesson Series is based.