Oklahoma State University Honors College — Junior Science and Humanities Symposium (JSHS)
The Great Plains regional Junior Science and Humanities Symposium, hosted by Oklahoma State University Honors College: high school students present original STEM research and compete for scholarships and recognition; no cost to register or take part.
The Kentucky state final of Poetry Out Loud, the national poetry recitation contest for high-school students; the state champion goes on to the National Finals in Washington, DC (April 26–28, 2027).
The Japan round of the FAI international young artists' aviation painting contest: children and teenagers living in Japan paint an A3 picture on the theme 'My first International Day of Air Sports', and the top Japanese works go on to the international contest.
Scottish Mathematical Council (UK branch of Mathématiques sans Frontières)
A 90 minute team mathematics competition, run in the UK by the Scottish Mathematical Council, in which a class tackles puzzles including one that must be answered in a foreign language.
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.
A 10-week, full-time translational research internship in the Texas Medical Center for high-school juniors and seniors, ending with a poster symposium.
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.