American Regions Mathematics League (ARML): A Complete Guide

If you’re a math-loving high schooler who enjoys competition, the American Regions Mathematics League (ARML) might be your ultimate challenge. Think team problem-solving, head-to-head contests against top students nationwide, and a chance to flex your mathematical muscles on a national stage. 

This blog is your go-to guide for everything ARML. We’ll cover what ARML is all about, how to qualify, key dates, requirements, and why it’s such a sought-after experience. If you’re wondering whether you’re eligible, how to join a team, or how ARML can benefit you, stick around too.

• What Is ARML?
• ARML Awards and Prizes
• How to Qualify for ARML
• How to Get into ARML
• How to Win ARML
• ARML Previous Winners
• Frequently Asked Questions
• Takeaways

What Is ARML?

The American Regions Mathematics League is a national team mathematics competition for students in grades 12 and below. Teams of 15 represent geographic regions and compete at multiple university sites on the same day using the same set of problems. The event blends collaborative and individual problem solving across several rounds.

ARML is held on the weekend after Memorial Day. For 2025, the contest is scheduled for May 30 to 31, at simultaneous host campuses. Regions attend the site that is closest or most convenient for travel. Teams typically arrive on Friday for check-in, orientation, a talk or mixer, and dorm check-in, then compete on Saturday and head home afterwards.

ARML Awards and Prizes

At ARML, top-performing teams and individuals earn recognition and awards for their outstanding problem-solving performance. While the competition is primarily about teamwork and collaboration, ARML also celebrates excellence through team rankings, individual honors, and special recognitions at each contest site.

Below is a summary of the Team and Individual Awards distributed each year:

For team events, all 15 official members receive equal recognition. Alternates may also receive certificates depending on regional policy.

Beyond medals and trophies, ARML recognizes teams and individuals who show exceptional performance or contribution to the competition environment. Some of the most notable recognitions include:

While ARML is primarily an academic competition and does not directly distribute monetary prizes, some regions and partner organizations offer scholarships to top participants. These scholarships typically recognize mathematical excellence, leadership, or consistent contributions to math competitions at large.

Students who place highly at ARML often go on to compete at other elite levels, such as the USA Mathematical Olympiad (USAMO) and the Mathematical Olympiad Summer Program (MOSP), where scholarship opportunities become available through partner institutions.

ARML scoring and judging are handled by a committee of mathematicians, educators, and veteran coaches.

• Team awards are determined by the combined scores from the Team, Power, Individual, and Relay rounds.
• Individual awards are based solely on scores from the Individual Round.
• Ties for individual awards are usually broken through pre-determined tiebreaker questions or time-based accuracy.

All results are verified and announced during the on-site awards ceremony at each host location.

How to Qualify for ARML

If you want to compete in ARML, you’ll first need to join a regional or state math team that participates in the annual competition. ARML isn’t an open-signup contest; every student competes as part of a team officially representing a specific geographic region.

Each region has its own qualifying process, which might involve local math leagues, state contests, or selection tests. The key is to perform well in regional and national-level math competitions, such as the American Mathematics Competitions (AMC), American Invitational Mathematics Examination (AIME), or your local math league tournaments, since coaches often use those results to form ARML teams.

Because ARML is a team-based competition, selection rules may differ by area. Some regions host tryouts, while others extend direct invitations based on performance in prior contests.

Eligibility

You must:

• Be a student in grade 12 or below during the school year of the competition.
• Not have graduated from high school before the competition year.
• Be 18 years old or younger on December 31 of the competition year (exceptions may be made for younger college entrants who completed high school early).

If you’re an incoming college freshman, you may still qualify as long as you completed your final year of high school during the competition year and have not yet begun college courses.

There are other eligibility rules:

• Students must compete as part of a regional team, not as individuals. Each team must consist of 15 members from a contiguous geographic region (e.g., a state, county, or metro area).
• A student can compete for only one region per year.
• Regions may have A, B, or C teams, allowing multiple groups of 15 students if there’s enough local interest.
• Coaches may select alternates who can attend and practice with the team but may only compete if a primary member withdraws.
• Many regions give preference to students who have competed in AMC, AIME, or similar math contests to gauge readiness.

Required documents

Participating in ARML involves registering with your regional team and submitting the necessary paperwork to confirm your participation. Here’s what you’ll typically need to prepare:

• A team registration or application form, which may include your school, grade, and math contest experience.
• A parent or guardian consent form, especially since travel and overnight lodging are involved.
• Medical and emergency contact forms, required by most host sites and regional coordinators.
• Proof of payment for registration and lodging fees.
• Additional travel waivers or agreements if transportation is provided by your team or school.

Your regional coach will guide you through the required paperwork and deadlines. It’s important to submit all forms early so your spot can be confirmed before travel and housing are arranged.

Contest fees

ARML does not charge a national entry fee to students directly, but local and regional teams collect participation fees to cover event expenses. These fees vary by region, depending on travel distance and accommodation costs:

• Regional participation fee. Most teams charge between $200–$400 per student, which covers the ARML registration, dorm lodging, meals, team T-shirt, and transportation to the host site.
• Travel and lodging costs. Teams that must fly or travel long distances may have higher fees to include airfare or bus rentals.
• School or sponsor funding. Many school districts, math leagues, or state education departments help cover these costs to make participation accessible.

Always confirm with your coach or regional coordinator what your fee includes and whether there are financial aid or sponsorship options.

Registration deadline

There is no single national ARML registration date. Each region sets its own deadline, but most fall between early and mid-April. Some teams open sign-ups as early as February or March, especially for students who must qualify through local contests.

By the end of April, all ARML rosters are finalized so that travel arrangements and room assignments can be confirmed before the late-May competition.

If you’re applying for a team that requires tryouts, those usually occur in March or early April, with invitations sent shortly after.

If you secure a spot, complete all paperwork and payments by your region’s posted deadline to confirm participation.

How to Get into ARML

Getting into ARML involves several key steps, from finding your regional team to preparing for the actual competition. Here’s a clear, step-by-step guide to help you understand the process and stay on track for success.

1. Understand the format.

Timeline: January–February (the year of the competition)

Before joining ARML, familiarize yourself with how the competition works. ARML is not an individual contest. Instead, you’ll compete as part of a 15-person team representing your region. The contest is held simultaneously at multiple host sites (such as Penn State, UNLV, Iowa, and the University of Alabama in Huntsville), and teams take the same problems across all locations.

Learn about the five main rounds: Team, Power, Individual, Relay, and Super Relay. Each has its own format and scoring method. Review past ARML contests on the official website to get a sense of timing, collaboration, and problem difficulty.

2. Find your regional ARML team.

Timeline: February–March

Every participant must compete through a regional team. Start by finding which ARML region you belong to: some are based on states (like Georgia ARML or Texas ARML), while others represent multiple states (like the Eastern Massachusetts or Western Pennsylvania teams).

Contact your local math league or math teacher to learn who coordinates your region’s team. Many regions hold tryouts or selection tests to determine who will join the A-team (main roster) and who will be placed on alternate teams.

3. Attend local tryouts or qualifying contests.

Timeline: March–April

Most regions select members based on performance in contests like AMC, AIME, or local math leagues. Some also host their own ARML tryouts. 

If you’re serious about joining, keep practicing competition-style problems and attending any practice sessions your region offers.

Tryouts often include:

• Short-answer questions modeled after ARML Individual Round problems.
• Group problem-solving sessions to evaluate teamwork.
• Written solutions or proofs similar to those used in the Power Round.

High scorers are offered spots on official ARML teams.

4. Complete your registration and forms.

Timeline: Early to mid-April

Once you’re selected, complete all regional registration steps to confirm your spot. This may include:

• Filling out team registration and emergency contact forms.
• Submitting parent or guardian consent.
• Paying participation fees (which cover housing, meals, and transportation).

Your coach or regional director will provide deadlines for these documents. Make sure to submit everything early so your travel and housing arrangements can be finalized.

5. Participate in team practices.

Timeline: April–May

In the weeks before the competition, most teams hold regular practices. These sessions are crucial for learning how to collaborate effectively, especially during Team and Relay Rounds.

Use practice time to:

• Solve past ARML and AIME problems under timed conditions.
• Simulate full team rounds to build coordination.
• Work on Power Round proofs and peer-review each other’s logic.
• Practice quick mental math to save time in relays.

Come prepared, stay engaged, and treat these practices as the real thing—they’re the best way to perform confidently when competition day arrives.

6. Finalize travel plans and packing.

Timeline: Late May

A week or two before the contest, confirm your travel itinerary and what you’ll need to bring. Make sure to pack:

• Several pencils and pens
• A scientific (non-graphing) calculator, if permitted
• Personal identification and team forms
• Comfortable clothes for long contest days
• A team T-shirt, if issued

Teams usually travel on Friday, May 30, 2025, and compete on Saturday, May 31, 2025. Check with your coach about specific meeting points, check-in times, and accommodations.

How to Win ARML

Here are some in-depth strategies to help your team perform at its highest level during ARML:

1. Master the competition format.

Before you can dominate ARML, you need to know it inside and out. Study the structure of each round—Team, Power, Individual, and Relay—and understand what skills each one tests.

Here’s what to expect in every part of the contest:

• Team Round. Practice efficient collaboration and communication. Set up mock rounds where you divide the 10 problems among teammates based on individual strengths.
• Power Round. This proof-based round is about depth and clarity. Work on constructing clean, logical write-ups with clear justifications and well-structured arguments.
• Individual Round. Focus on speed and accuracy. Solve timed sets of short-answer questions from past contests to simulate pressure.
• Relay Round. Drill timing and teamwork. Practice quickly passing answers and checking for errors since one small mistake can affect the entire chain.

Knowing every rule, time limit, and scoring nuance gives you a major edge.

2. Build strong foundations in core math topics.

ARML questions draw from several key areas and levels of mathematics, namely:

• Algebra. Master inequalities, polynomials, functional equations, and systems of equations.
• Geometry. Practice coordinate geometry, circle theorems, and creative angle chasing.
• Number Theory. Study modular arithmetic, divisibility, and Diophantine equations.
• Combinatorics. Get comfortable with counting, probability, recursion, and generating functions.

To succeed, you need a firm grasp of all four. More than just memorizing formulas, the best competitors understand how and when to apply them too.

3. Practice under realistic conditions.

The pressure at ARML is intense, and the rounds move fast. To prepare, simulate full-length contests by doing the following:

• Hold Team Round drills with strict time limits.
• Write mock Power Rounds with your teammates and have them peer-reviewed for clarity and rigor.
• Practice Relay Rounds where the team splits into small groups of three to build coordination.

Recreate real contest conditions so the actual event feels familiar. That means using the same timing, communication limits, and answer sheets.

Outside of getting used to the pacing of solving problems, you’ll also learn to maintain confidence and stay positive. Deep breathing between rounds can help reset your focus. You’ll also learn to encourage your teammates—which is important as well since positive energy keeps morale high and helps the group perform at its best.

Teams that stay composed and supportive of one another consistently outperform those that let stress or frustration take over.

4. Strengthen teamwork and communication.

Since ARML is a team competition, communication can make or break your performance. To strengthen your collaboration, try the following strategies:

• Learn to explain ideas clearly and concisely under time pressure.
• Develop a system for dividing problems during the Team Round: assign geometry to one person, number theory to another, etc.
• During the Power Round, designate a “scribe” to handle final write-ups and others to verify reasoning and notation.

A well-coordinated team with good chemistry often outperforms one with higher individual scores but poor collaboration.

5. Learn from past contests.

One of the most effective ways to prepare for ARML is to study past contest problems. Working through previous exams helps you identify trends and build familiarity with ARML’s unique problem style. As you review old tests from the past five to ten years, focus on the following strategies:

• Identify recurring problem types or concepts. Pay attention to topics or patterns that frequently appear, such as geometry proofs or combinatorial counting problems.
• Track which question types appear in the same rounds each year. Understanding which topics are common to Team, Power, or Individual Rounds will help you allocate study time effectively.
• Time yourself and review your pacing. Practice under real contest conditions and take note of which topics take you the longest to solve.

ARML’s archives are publicly available online and serve as an invaluable training resource for teams and individuals alike.

6. Stay consistent with problem-solving practice.

ARML champions rarely prepare overnight. Their success comes from consistent, year-round practice through math leagues, online problem sets, and summer math programs like Mathcamp.

Here’s how you can develop similar consistency:

• Solve a few problems daily. Focus on shorter, regular practice sessions instead of infrequent, long study marathons.
• Review your mistakes carefully. Reflect on why an error happened and what concept or method could have prevented it.
• Join math circles or online groups. Surround yourself with other students who enjoy problem solving to stay motivated and challenged.

Regular, steady practice helps sharpen your reasoning skills and ensures that problem-solving speed becomes second nature.

7. Manage time wisely during the contest.

Because ARML’s rounds are short, time management is just as important as accuracy. Learn how to pace yourself and your team during each section by following these tips:

• In the Individual Round, avoid spending too much time on one question. Skip it and come back later if needed to maximize your score.
• During the Team Round, decide early whether to split the problems or work together on the hardest ones. Setting this plan before the timer starts prevents confusion mid-round.
• In the Relay Round, maintain a steady flow of answers. If you’re unsure, make your best educated guess and pass it on rather than hesitating, which costs valuable seconds.

Good pacing is a skill that can be practiced. The better you control your time, the more confident you’ll feel under pressure.

8. Review strategies as a team before competition day.

In the final week leading up to ARML, your team should take time to meet and finalize strategies for each round. These discussions are essential for preventing confusion and making sure everyone knows their specific responsibilities.

To make the most of this review session, focus on the following areas:

• Agree on how to divide the work. Decide in advance which members will handle geometry, algebra, number theory, or combinatorics during the Team and Power Rounds. This helps avoid overlapping efforts and saves valuable time during the competition.
• Rehearse conflict resolution. Practice how to handle disagreements or uncertain answers efficiently so the team can move forward quickly and maintain focus.
• Refine your Power Round format. Review how you present solutions, ensuring all proofs are organized, readable, and logically structured with consistent notation.

By walking through each round together before competition day, your team will enter ARML confident, coordinated, and ready to perform at its best.

ARML Previous Winners

Each year, ARML recognizes the top-performing teams and individuals who demonstrate exceptional mathematical talent and teamwork. The 2025 ARML competition brought together 128 teams and over 1,800 students from the United States, Canada, China, and South Korea. 

Sponsored by the D. E. Shaw Group, the event took place simultaneously at the University of Iowa, University of Nevada–Reno, Pennsylvania State University, St. Anselm College, and Western Carolina University.

Top teams

In the Division A category, Lehigh Valley A1 captured first place, followed by SFBA/NorCal A1 and Washington A1.

In Division B, Montgomery (MD) B1 earned the top position, with Minnesota B1 and Massachusetts B1 rounding out the top three.

Each of the winning teams received medals and book prizes from sponsors such as the American Mathematical Society, Mu Alpha Theta, Penguin Random House, and Princeton University Press.

Top individual winners

The 2025 competition’s top individual was Christopher Qiu from Central Jersey A1, who answered every question correctly and secured first place with a perfect score and the fastest tiebreaker time. He was awarded $1,500 courtesy of the D. E. Shaw Group.

Other high-ranking individuals were also recognized with cash prizes:

The top twenty individuals each received cash awards, and every participant who achieved a perfect individual score was recognized at their site’s award ceremony.

Other competition highlights

• Over 1800 participants competed across five university campuses in 2025.
• Lehigh Valley A1 earned the highest overall score in Division A with 234 points.
• Christopher Qiu became one of the few students in ARML history to achieve a fully correct individual round with the fastest tiebreaker.
• Teams received sponsorship and prizes from leading organizations supporting mathematics education.

The next ARML competition will celebrate its 51st edition on May 29 to 30, 2026, continuing its legacy as one of the most prestigious mathematics competitions in North America.

Frequently Asked Questions

1. How many students compete in ARML?

Each year, ARML brings together over 1,800 students from across the United States and abroad. Participants represent regional math teams that have qualified through local and state math leagues.

2. What is the difference between ARML and other math competitions like AMC or AIME?

AMC and AIME focus on individual performance and serve as qualifiers for the USA Mathematical Olympiad. Meanwhile, ARML is primarily a team-based competition. It emphasizes collaboration, communication, and problem-solving across four main rounds: Team, Power, Individual, and Relay.

3. How do I join an ARML team?

Students usually join through regional math leagues or school-based teams. Many states have official ARML representatives who organize tryouts and select participants. If your school does not have an ARML team, you can often join a local math circle or state-level program that participates in ARML.

4. When will ARML 2026 take place?

The 2026 ARML competition is scheduled for May 29 to 30, 2026. The event will be held simultaneously at multiple host sites across the U.S., with teams competing under the same problems at each location.

5. What topics or math areas does ARML cover?

ARML problems span a wide range of high school mathematics, including algebra, geometry, number theory, combinatorics, and probability. The competition places a strong emphasis on creative reasoning, teamwork, and clear communication rather than memorization or computation.

Takeaways

The American Regions Mathematics League (ARML) is one of the most prestigious high school math competitions in the world, uniting top math students through collaboration, creativity, and critical thinking.

• Competing at ARML demonstrates advanced problem-solving ability, teamwork, and communication, which are essential skills for success in math and beyond.
• The 2026 ARML competition will take place on May 29 to 30, 2026, across multiple host sites including the University of Iowa, University of Nevada–Reno, Pennsylvania State University, St. Anselm College, and Western Carolina University.
• Top-performing teams and individuals receive trophies, medals, and scholarships, with prizes sponsored by organizations such as the D. E. Shaw Group and Mu Alpha Theta.
• The best performances come from consistent practice, clear communication, and strategic teamwork across the Team, Power, Individual, and Relay Rounds.
• Working with a college admissions consultant can help you present your ARML accomplishments as a powerful part of your college application. AdmissionSight’s experienced team helps students craft polished essays and application materials that showcase their leadership, problem-solving, and teamwork skills gained from the competition—turning your ARML experience into a compelling story that stands out to admissions officers.