Longwood University — Junior Science and Humanities Symposium (JSHS)
The Virginia regional Junior Science and Humanities Symposium, administered by Longwood University: high-school students present original STEM research and compete for scholarships and recognition, with no cost to take part.
Teach Democracy (formerly Constitutional Rights Foundation)
The 46th annual California Mock Trial Competition: high-school teams argue a fictional case in county competitions, with county champions advancing to the state finals.
Capital University — Junior Science and Humanities Symposium (JSHS)
The Ohio regional Junior Science and Humanities Symposium, hosted by Capital University: high school students present original STEM research and compete for scholarships and recognition; no cost to register or take part.
British International Education Association (BIEA)
A team STEM innovation competition run by the British International Education Association; the 2027 theme asks students to design a solution to reduce overfishing from sea to table.
The fourth Yale Model UN conference in Singapore, run by Yale students: three days of committee debate with workshops and speaker sessions for secondary and JC students.
America's premier Japanese-language competition for high school students: teams of two or three compete at Level II, III or IV in Washington, DC on April 23–24, 2027.
株式会社Aoba-BBT アタッカーズ・ビジネススクール (Aoba-BBT, Inc. / Attackers Business School)
A free-entry international startup pitch contest marking the 30th anniversary of Aoba-BBT's Attackers Business School, with a dedicated division for junior high and high school students under 18 living in Japan and a global final in Tokyo.
A free international essay competition for students aged 11–18, run by the independent organisation Oxford Global Education, with a live oral defence final.