12 Challenging Global Competitions for High School Students 

Global competitions for high school students offer more than recognition. These academically challenging extracurricular activities help participants test their abilities, pursue their interests and demonstrate initiative. This engagement can also support a university application. In fact, Stanford University’s Common Data Set 2025-26  rates extracurricular activities as “Very Important,” alongside GPA and course rigour. 

Although competitions are not an entry requirement, admissions officers may consider relevant distinctions when assessing an applicant’s profile. For example, David duKor-Jackson, a former Admissions Officer at the Massachusetts Institute of Technology, explains: “An International Olympiad Medal is certainly an external validator for a student’s claim for excellence in a specific area.”

Beyond admissions, these international contests build resilience, problem-solving skills and cultural awareness. This blog explores twelve prestigious options across coding and technology, science, and mathematics.

Global competitions for high school students in STEM, coding and technology 

These international contests allow students to apply computational thinking to complex problems. The following options test programming, algorithms and digital innovation. 

1) American Computer Science League (ACSL)

Location: Online 
Age group: Students in grades 3-12 or Sixth Form (divided into Elementary, Classroom, Junior, Intermediate, and Senior Divisions)
Competition content: Computer Science Theory (such as Boolean Algebra, Graph Theory), Programming Challenges (Python, C++, Java)
Deadlines/competition dates:
– Regular Season (four contests): November – May annually
– Invitational finals: Late May annually

The American Computer Science League is a longstanding global competition for high school students. Established in 1978, it welcomes participants from primary school through grade 12, or Sixth Form in the UK.  Its five divisions cater to different ages, experience levels and abilities.

During the academic year, students complete four regular-season contests. These assess their knowledge of computer science theory and coding. High-scoring participants then receive invitations to the annual online Finals, hosted through HackerRank.

For the upper divisions, the Finals include a three-hour programming challenge and a one-hour written section. Both components cover material studied during the season. As an international computer science competition, ACSL helps students develop computational thinking and strengthen their programming skills. It also stands out among global competitions for high school students by offering recognition within the international computer science community.

2) Stanford ProCo 

Location: Stanford University, US
Age group: Students in grades 9-12
Competition content: Algorithmic problem-solving in the style of ACM-ICPC (covering topics such as Data Structures, Dynamic Programming, and Graph Theory)
Deadlines/competition dates: 
– Registrations: Close in late April
– Competition: Late April / Early May annually

Global competitions for high school students include Stanford ProCo, an annual contest focused on algorithmic programming. The Association for Computing Machinery chapter organises the event. The competition gives students a fun, engaging opportunity to explore their passion for computer science. 

Participants compete in teams of up to three members. Each team tackles nine to 15 algorithmic problems within three hours. 

The competition has two divisions: 

• The Novice Division: For participants with less than two years of programming experience.
• The Advanced Division: For more experienced competitors (including those who have competed in USACO Silver or above, or participated in previous ProCo contests). 

Both divisions attempt the same problem set. However, organisers rank teams and award prizes separately within each division. Rankings depend on the number of problems solved. In the event of a tie, ICPC-style penalty points account for completion time and incorrect submissions.

ProCo lets participants challenge their programming skills and connect with peers who share similar technical interests. Its emphasis on learning and collaboration also prepares students for advanced competitive programming contests. Its team-based format also adds a collaborative element. 

3) Microsoft Imagine Cup

Location: Global (Online and in-person events)
Age group: 18 years and above; participants must attend an accredited high school, college or university 
Competition content: Technology solutions that use at least two Microsoft AI services; submissions require a pitch deck, recorded pitch video and demo video
Deadlines/competition dates:
– Registration and Round 1 submissions: October – January annually
– Semifinals: February – April annually
– World championship: May annually

Unlike many global competitions for high school students, the Microsoft Imagine Cup also welcomes eligible college and university students. This global technology competition and startup incubator helps participants develop technical ideas into market-ready solutions. Entrants use Microsoft AI platforms, including Azure AI services, to address real-world and business challenges.

Students can participate individually or in teams of up to four. They must develop a functional minimum viable product and present their idea through a pitch deck and demonstration videos. Participants may also submit an interactive prototype.

The competition offers two tracks:

• Launch: For early-stage projects and prototypes.
• Scale: For student-led startups with user traction or non-dilutive funding.

Judges assess submissions based on technical innovation, inclusion, feasibility and market viability. Successful teams progress through the semi-final rounds. The finalists then advance to the World Championship, where they compete for seed funding. They also receive access to mentorship from Microsoft leaders.

4) The Conrad Challenge

Location: Global (Online preliminary phases leading to the annual Innovation Summit at Space Center Houston, US)
Age group: Students aged 13–18 (competing in teams of 2–5 with an adult coach)
Competition content: Developing commercially viable STEM products and tech-enabled solutions to real-world challenges across categories such as Cyber Technology & Security, Aerospace & Aviation, Energy & Environment, Health & Nutrition, and Water
Deadlines/competition dates: 
– Registration and preliminary entry: Late August to Late October 
– Competition: October – November annually

The Conrad Challenge is a global competition for high school students who want to combine STEM, entrepreneurship and real-world problem-solving. The annual, multi-stage contest encourages participants to turn technical ideas into commercially viable startup solutions. Students work in teams to identify a challenge, develop an innovation and present a practical business case.

The competition has three main phases. During the Activation Stage, students form teams and complete their initial setup. In the Innovation Stage, they develop an Innovation Brief, technical video, business plan and website. Selected finalists then advance to the Innovation Summit, where they present a live pitch to subject-matter experts, industry leaders and venture capital judges at Space Center Houston.

Named in honour of Apollo 12 astronaut Charles “Pete” Conrad, the contest connects scientific research, engineering and enterprise. High-performing teams may be recognised as Pete Conrad Scholars. These distinctions can include scholarships, patent support, international travel grants and seed funding opportunities.

Among global competitions for high school students, the Conrad Challenge stands out for its emphasis on applied innovation. It gives participants the chance to move beyond theoretical problem-solving and understand how ideas can become products, ventures and social-impact solutions. 

International science competitions for high school students 

International science competitions encourage students to investigate complex questions and present evidence-based solutions. The following options span independent research, physics and chemistry. 

 1) Regeneron International Science and Engineering Fair (ISEF)

Location: Rotates annually among major US host cities (e.g., Phoenix, AZ; Columbus, OH; Los Angeles, CA) 
Age group: Students in grades 9-12
Competition content: Original research across 22 scientific categories
Deadlines/competition dates:
– Local/regional qualifying deadlines: Autumn – March annually
– Global event: Mid-May annually

The Regeneron International Science and Engineering Fair is a prominent global competition for high school students. It is the world’s largest pre-college STEM competition. Each year, it attracts more than 1,800 students from over 75 countries, regions and territories. The Society for Science organises ISEF. It allows young scientists to present original research on an international platform. Participants also compete for nearly US$9 million in awards, scholarships and internships. 

Students cannot apply to ISEF directly. Instead, they must qualify through a Society-affiliated local, regional or national science fair. These qualifying events take place in more than 60 countries and territories. Therefore, participants must first earn their place through preliminary competitions. 

Judges assess projects based on originality, scientific rigour and clarity of presentation. Finalists compete across 22 categories. These include engineering, earth and environmental science, biomedical and health sciences, computational biology and bioinformatics, and behavioural and social sciences. Winners may receive cash prizes, scholarships or awards sponsored by partner organisations. 

Beyond recognising scientific achievement, ISEF encourages international collaboration and cultural exchange. The week-long event also includes networking sessions, educational seminars and cultural activities.

2) Sir Isaac Newton (SIN) Exam

Location: Global; administered online under local teacher or school supervision
Age group: Typically grades 11–12; available for students in lower grades
Competition content: Fundamental Classical Mechanics, logical deduction, and creative problem-solving
Deadlines/competition dates:
– Registration opens: Mid-February annually
– Exam date: First Thursday in May annually

Physics adds another discipline to this selection of global competitions for high school students. The University of Waterloo’s Department of Physics and Astronomy organises the Sir Isaac Newton Exam. This longstanding international contest tests students’ understanding of physics.

The examination takes place annually on the first Thursday in May. Registration usually opens in mid-February. Although academically rigorous, the questions often incorporate political and popular-culture humour.

Participants have two hours to complete the online examination. The questions go beyond applying standard formulae directly. Instead, they test physical insight, common sense and mathematical reasoning. Students may use scientific, non-programmable calculators.

The SIN Exam can help participants assess their readiness for university-level physics. Raw scores do not negatively affect university admissions. However, the highest-scoring participants worldwide may submit formal written solutions. Eligible students can receive book awards and merit-based scholarships towards programmes in the University of Waterloo’s Faculty of Science.

Its combination of scientific reasoning, creativity and humour distinguishes the SIN Exam from other global competitions for high school students.

3) Chem 13 News and Avogadro Chemistry Exams 

Location: Online; administered through accredited high schools globally
Age group: Avogadro Exam – Students in Grade 11 | Chem 13 News Exam – Students in Grade 12
Competition content: Avogadro Exam – Structure of Matter, Bonding, Reactions, Solutions, and Gases | Chem 13 News Exam – Organic Chemistry, Equilibria, Kinetics, Oxidation-Reduction, Bonding, Structure, Reactions, Solutions, and Gases (including advanced probing questions) 
Deadlines/competition dates:
– Chem 13 News exam date: Early May annually
– Avogadro exam date: Mid-May annually

The University of Waterloo’s Department of Chemistry organises two global competitions for high school students: the Chem 13 News and Avogadro Exams. These longstanding online contests assess students’ understanding of chemistry. Schools worldwide administer them under local supervision.

Both examinations contain 40 multiple-choice questions. Students have 75 minutes to complete each paper. The Avogadro Exam covers grade 11 chemistry concepts. In contrast, the Chem 13 News Exam assesses more advanced material for grade 12 students.

The University of Waterloo awards Certificates of Distinction to the highest-scoring participants. Students who take the Chem 13 News Exam may also qualify for a $1,000 Faculty of Science Contest Award. To receive it, they must enrol in a full-time undergraduate degree programme within the University’s Faculty of Science. However, Aviation, Optometry and Pharmacy programmes are excluded.

The University does not use examination results during its formal admissions evaluation process. Nevertheless, participation can help students assess their preparation for university-level chemistry. 

Global mathematics contests for students in high school

Global mathematics contests challenge students to move beyond routine formulae. Participants use logic, creativity and rigorous reasoning to solve unfamiliar problems. 

1) International Mathematical Olympiad (IMO)

Location: Rotates annually among host countries
Age group: Students under 20 who have not enrolled in tertiary education
Competition content: Advanced pre-university mathematics, including Euclidean geometry, number theory, algebra and combinatorics
Deadlines/competition dates:
– National qualifying rounds: Ongoing throughout the academic year
– World finals: Mid-July annually

The International Mathematical Olympiad is the flagship global mathematics contest for high school students. Established in 1959, it brings together national teams from more than 100 countries. Each participating nation can send up to six students.

Students cannot apply to the IMO directly. Instead, they must progress through their country’s national selection process. These pathways differ across countries:

• The US: Students begin with the AMC 10 or AMC 12. Qualifying participants advance to the American Invitational Mathematics Examination. Successful candidates may then progress to the USAMO or USAJMO, followed by the Mathematical Olympiad Program and team selection tests.
• The UK: Students typically progress from the Senior Mathematical Challenge to the British Mathematical Olympiad. Selected participants then attend training and selection camps, including the spring camp at Trinity College, Cambridge.
• Other countries: Similar multi-stage systems operate worldwide. Examples include India’s INMO and training-camp pathway, the Australian Mathematical Olympiad, and the Canadian Mathematical Olympiad. In India, six students are ultimately selected for the national IMO team through tests held during the International Mathematical Olympiad Training Camp.

The IMO takes place over two consecutive days. Participants have four and a half hours each day to solve three proof-based problems. These questions test mathematical intuition, creative reasoning and rigorous proof writing. They do not rely on advanced calculus or the routine application of school-level techniques.

IMO medals and distinctions in national qualifying Olympiads demonstrate exceptional mathematical ability. Beyond recognition, the competition encourages intellectual exchange among young mathematicians from different countries.

 2) Harvard-MIT Mathematics Tournament (HMMT)

Location: Harvard University (November) and MIT (February), US
Age group: Students in grades 8-9
Competition content: Advanced mathematics, including algebra, geometry, combinatorics, and proof-based problem-solving
Deadlines/competition dates:
– Tournament 1: Early November annually | Registration closes in late September
– Tournament 2: Mid-February annually | Registration closes mid-December

For those interested in advanced mathematics, the Harvard-MIT Mathematics Tournament (HMMT) is among the most challenging global competitions for high school students. Students from Harvard University and the Massachusetts Institute of Technology organise the tournament. It attracts nearly 1,000 participants from around the world. Many have also excelled in national and international mathematics Olympiads.

HMMT takes place twice each year. Harvard University hosts the November tournament, while the Massachusetts Institute of Technology hosts the February event. The November competition is more accessible and features short-answer problems. In contrast, the February tournament emphasises rigorous, proof-based questions. It attracts students with considerable mathematical experience.

Each tournament includes three main rounds:

• Individual Round: Students solve challenging problems independently. The questions test their abilities across several areas of mathematics.
• Team Round: Participants collaborate to solve complex mathematical problems. The February tournament gives greater emphasis to proof-based questions.
• Guts Round: Teams solve sets of problems in a fast-paced, real-time format. Organisers update the scores live, creating a dynamic competitive environment.

The tournament tests individual ability, teamwork and mathematical reasoning. Its demanding format distinguishes HMMT from many other global competitions for high school students.

3) American Mathematics Competitions (AMC 10/12)

Location: In person at registered schools, universities or approved testing centres; remote and online proctoring are not permitted
Age group: AMC 10 – Students in grade 10 or below who are under 17.5 years of age | AMC 12 – Students in grade 12 or below who are under 19.5 years of age 
Competition content: Mathematics up to grade 10 or grade 12, including algebra, geometry, number theory, counting and probability; calculus is excluded 
Deadlines/competition dates:
– AMC 10A & 12A exam date: Early November annually
– AMC 10B & 12B exam date: Mid-November annually

The AMC 10 and AMC 12 are established global competitions for high school students who enjoy mathematical problem-solving. The Mathematical Association of America conducts both contests. Through this international format, students develop analytical thinking and engage with challenging mathematical concepts.

Participants answer 25 questions without using a calculator. They have 75 minutes to complete the contest. The problems test logical reasoning and a thorough understanding of mathematical principles. Therefore, students must do more than apply memorised formulae.

Students who achieve qualifying scores advance to the American Invitational Mathematics Examination.

Global business and entrepreneurship competitions

Business and entrepreneurship global competitions for high school students test strategy, market awareness, communication and decision-making through case analysis, startup pitches and venture-building formats.

1) Harvard Student Agencies Case Competition 

Location: Virtual
Age group: High school students globally, with strictly individual participation
Competition content: Analysing a real-world business case, developing a strategic response, and submitting a written strategy deck and video pitch
Deadlines/competition dates:
– Registration and preliminary entry window: Late August-mid-October annually
– Round 1: Strategy Deck Submission in late October annually
– Round 2: Video Pitch Final in November annually

The Harvard Student Agencies Case Competition is a global virtual business contest for high school students interested in strategic management, consulting and entrepreneurship. Unlike team-based business challenges, this competition requires individual participation. Therefore, each participant independently analyses a real-world company’s operational or strategic challenge and develops a structured recommendation.

The competition takes place entirely online across two evaluation rounds. In the first round, students examine a detailed business case study and submit a written strategy deck with their analysis, proposed solution and recommendations. High-performing participants then advance to the final round, where they record and submit a video pitch that presents their strategy to a panel of judges.

Organised by Harvard Student Agencies, the contest gives participants direct experience in business problem-solving, analytical thinking and executive-style communication. Winners and finalists may receive cash awards and internship scholarships that support their academic and professional development.

Among global competitions for high school students, the Harvard Student Agencies Case Competition is valuable for students who want to demonstrate initiative, critical thinking and practical business acumen. It also helps participants understand how business leaders evaluate problems, compare options and present clear recommendations.

2) Seton Hall’s Pirates Pitch 

Location: Hybrid, with initial online submissions leading to a live and livestreamed final event at Seton Hall University, US
Age group: High school sophomores, juniors and seniors in grades 10-12, with a minimum 3.0 GPA
Competition content: Original startup concepts or existing businesses presented through a written pitch or short video, followed by a live pitch presentation for finalists
Deadlines/competition dates:
– Registration and preliminary entry window: Late August-late October annually
– Finalist selection: Early November annually
– Live pitch final: Mid-to-late November annually 

Seton Hall’s Pirates Pitch for High School Students is an annual entrepreneurship challenge hosted by the Stillman School of Business. Modelled after Shark Tank, the contest gives young founders a platform to test business ideas, understand venture creation and present original concepts to experienced judges.

The competition takes place in two stages. In the first round, participants submit either a short written pitch or a three-minute video. Their entry must address key business fundamentals, including the target audience, market problem, revenue model and competitive advantage. A judging panel then selects 10 finalists to present a five-minute live pitch, followed by a Q&A session, before judges, peers and a virtual audience.

Hosted by Seton Hall’s Center of Innovation and Entrepreneurship, the contest awards cash prizes and university scholarships. Winners may receive direct cash awards and tuition scholarships, while finalists can receive scholarship offers to attend Seton Hall University. Additional recognitions, such as the Audience Choice Award, further encourage students to refine their ideas and presentation skills.

Among global competitions for high school students, Pirates Pitch is especially useful for those interested in entrepreneurship, business strategy and innovation. It helps students move from a creative idea to a structured venture proposal while demonstrating initiative, communication skills and practical business thinking.

How global competitions for high school students build lasting skills

Global competitions impact high school students beyond the classroom. Here’s a quick round-up  of how they  can contribute to their growth:  

If you need help choosing competitions that align with your interests and abilities, get in touch with The Red Pen. For more guidance on undergraduate admissions, read: How to Enhance Your College Application by Showcasing  Intellectual Curiosity and 16 Most Competitive US Summer Programmes for International Students: A Comprehensive Guide.