Model United Nations, also known as Model UN or MUN, is an educational model of the United Nations used for simulations in which students learn about diplomacy and international relations. At a MUN conference, each student works as the representative of a country, organization, or person, and must solve a problem with other delegates from around the world.

An extracurricular activity (ECA) or extra academic activity (EAA) or cultural activities is an activity, performed by students, that falls outside the realm of the normal curriculum of school, college or university education. Such activities are generally voluntary (as opposed to mandatory), social, philanthropic, and often involve others of the same age. Students and staff direct these activities under faculty sponsorship, although student-led initiatives, such as independent newspapers, are very common. However, sometimes the school principals and teachers also bring in these activities in the school among the students.