Tustin High School Model United Nations

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What is MUN?

Model United Nations (MUN) is an internationally recognized debate and negotiation program in which students can learn about diplomacy, international relations, and the United Nations through educational simulation and academic competition.

Who Can Join?

Anyone who is interested may take MUN! Over 100 students participate each year across four grade levels in a-g approved honors elective courses. There are NO prerequisite classes, grade requirements, or applications to be an MUN student, but interested students should be diligent, motivated learners. If you have a drive to learn and space in your schedule, sign up with your counselor!

You might enjoy and succeed in MUN if you:

    • like to debate and discuss global issues or current events

    • want gain leadership experience

    • want to improve your speaking or research skills

    • want to make friends across grade levels

    • want to attend a 4-year university

    • are a diligent and/or enthusiastic student

    • want to compete to earn awards

    • want to travel locally, nationally, and internationally

    • would like to graduate with special recognition

Hear from Current MUN Students!


What is MUN all about?

THSMUN 2019.mp4


Model United Nations (MUN) students take on the role of a diplomat from a specific country and represent that country in a simulated United Nations committee during a one-to-three day conference.


Students prepare for MUN conferences by researching world issues and the positions of the countries they will represent.


Tustin MUN students grow as leaders in their four years in the program, serving as mentors to younger students and as the coordinators of Tustin's own MUN conference.

Debate & Diplomacy

During these conferences, Tustin students interact with students from other schools, debating the issues they have researched.

THSMUN committee in progress
MUN Camp 2019.mp4


MUN is also a family! Students make life long friends and mentors from across grade levels. Because students meet as freshmen and grow through the grade levels together, many of our MUNers remain friends for life!

Global Service

All MUN students work toward improving their global awareness by devising and executing a Capstone service project over their four years in MUN based on the United Nations Sustainable Development Goals.


THSMUN travels yearly to compete in Northern California, Europe and the East Coast! Travel is an amazing opportunity for students to see the world and experience other cultures as part of their school curriculum.

1SE - East Coast MUN 2020 (20200214-133553).mp4
PRAMUN 2020.mp4
student with pennant for UC Berkeley
student with pennant for UCLA

College Readiness and Rigor

MUN is a rigorous honors elective that is A-G approved by the UC system for Tustin Unified School District. Students learn problem solving and critical thinking in an inquiry-based environment. MUN is also recognized as a highly-prized extracurricular activity by many top universities around the world. Many of our graduates have gone on to prestigious four-year universities.

Ready to join? Email any advisor for more details, or see your guidance counselor to enroll!

Mrs. ServinProgram

Tustin High School has had an MUN program for over 25 years. Over 100 students participate each year across four grade levels in a-g approved honors elective courses. Students compete across Southern California throughout the year, and travel every year both across the United States and to Europe. Students in MUN learn skills like leadership, research, academic writing, and public speaking, and many go on to four-year universities.