Model United Nations (MUN) simulations are popular exercises for those interested in learning more about the UN. It is estimated that hundreds of thousands of students worldwide participate every year in Model UN at all educational levels in schools and universities. Many of today's leaders in law, government, business and the arts participated in Model UN as students. Some Model UNs however do not follow the actual rules and practices used at the UN. This guide is designed for students and teachers on how to organize and participate in Model UNs that simulate the way the UN actually works.