| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Cost | Last year's cycle (2026): $550; 2027: Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Financial aid | Last year's cycle (2026): Need-based SLIYS financial aid: Amount: Unconfirmed — check official site. Applicants requested consideration in Additional Comments; award amounts, budget, documentation, and guarantees were not published.; 2027: Unconfirmed — check official site | Last year's cycle (2026): U.S. family-income guarantee: Amount: Unconfirmed — check official site. U.S. students from families under $80,000 attended free in 2026.; Full/partial need-based aid and international aid: Amount: Unconfirmed — check official site. Aid available where cost is a barrier; international aid considered case by case.; 2027: Unconfirmed — check official site | Unconfirmed — check official site |
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| Expenses and aid conditions | Last year's cycle (2026): Accepted-scholar seat deposit: $25. Nonrefundable, due within two weeks of acceptance, and included in rather than added to the total tuition.; Need-based SLIYS financial aid: Amount: Unconfirmed — check official site. Applicants requested consideration in Additional Comments; award amounts, budget, documentation, and guarantees were not published.; 2027: Unconfirmed — check official site | Last year's cycle (2026): U.S. family-income guarantee: Amount: Unconfirmed — check official site. U.S. students from families under $80,000 attended free in 2026.; Full/partial need-based aid and international aid: Amount: Unconfirmed — check official site. Aid available where cost is a barrier; international aid considered case by case.; 2027: Unconfirmed — check official site | Unconfirmed — check official site |
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| Stipend or pay | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Eligibility | Grades 9–12; Grade timing: Unconfirmed — check official site | Grades 10–12; Grade timing: Unconfirmed — check official site | Grade 11 when applying; summer rising grade is one higher |
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| Additional eligibility | Ages 13–18; Residency: High-school students worldwide who can attend all live Eastern Time sessions; Requirement: Enter grade 9, 10, 11, or 12 in the upcoming school year; Requirement: Show academic and personal readiness for competitive interactive linguistics study; 3.0 GPA is recommended, not required; Requirement: Attend all five live five-hour weekdays for each selected week; Requirement: Use a laptop or desktop, webcam, microphone, headphones or earbuds, reliable internet, and quiet room; Requirement: Complete SLIYS 1 before enrolling in SLIYS 2; Requirement: Have a parent or legal guardian participate in the application; Exclusion: Students outside the entering-grade and typical age range without specific SLIYS approval; Exclusion: SLIYS 2-only applicants who have not previously completed SLIYS 1; Exclusion: Students unable to attend live; recorded catch-up is prohibited; Exclusion: A GPA below 3.0 is not an automatic exclusion, and a GPA above 3.0 is not a guarantee; Exclusion: Prior language or linguistics study is not presented as a universal requirement | Ages 14–18; Residency: Students from the United States and abroad are eligible; international financial aid is case by case; Requirement: Be age 14-18 by the applicable program cutoff; Requirement: Have completed grade 9 or equivalent before the session; Requirement: Not be enrolled full time in a college or university by the program's first day; Requirement: Be available for the entire six-week residential session and comply with dormitory, curfew, visiting, safeguarding, and conduct rules; Requirement: Independently attempt the official application problem set and explain experiments, conjectures, proofs, and partial progress; Requirement: Submit the required recommendation, transcript, form, short answers, and any financial-aid documents; Requirement: Retain scratch work and be prepared to explain reasoning if originality is verified; Exclusion: Applicants outside the age/education window or already full-time college students at program start; Exclusion: Collaborative, copied, AI-assisted, internet-generated, uncited, or inadequately explained problem-set work; Exclusion: Applicants unable to reside for the full six weeks or follow residential/safety expectations; Exclusion: Assuming all eight problems must be solved or that prior advanced courses/research are required; Exclusion: Assuming selection guarantees aid, publication, conference presentation, college credit, recommendation, admission advantage, internship, or job | Citizenship: U.S. citizens eligible regardless of residence; Citizenship: Non-U.S. citizens already in the United States on F-1 status eligible; Citizenship: Other U.S. visa holders must ask GSTEM to confirm eligibility; Residency: Non-U.S. citizens living outside the United States are not eligible; Requirement: Be a current high-school junior; Requirement: Show strong academic work, STEM aptitude, and demonstrated STEM interest; Requirement: Support GSTEM's mission of serving groups historically excluded from STEM; Requirement: Attend every day for all six weeks; Requirement: Do not participate in another program simultaneously; Exclusion: Current sophomores, seniors, and non-U.S. citizens living outside the United States; Exclusion: Applicants unable to attend the full six-week program |
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| Session dates or duration | Catalog terms: 1–2 weeks; 2027: Unconfirmed — check official site | Catalog terms: 6 weeks; 2027: Unconfirmed — check official site | Catalog terms: 6 weeks; 2027: Unconfirmed — check official site |
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| Format | Online | In person | In person |
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| Housing and supervision | Non-residential. Supervision and housing details: Unconfirmed — check official site | Residential. Supervision and housing details: Unconfirmed — check official site | Non-residential. Supervision and housing details: Unconfirmed — check official site |
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| Location | Worldwide live online participation aligned to Eastern Time | Boston, Boston University campus, Massachusetts | New York City, New York |
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| Selection and application | Selection: Admission is competitive and sessions can fill before the final deadline. Ohio State publishes no application count, admit rate, scoring rubric, class size by session, waitlist probability, or guarantee based on GPA. Application materials: One teacher recommendation for SLIYS 1 or 1-and-2 applicants; none for prior SLIYS 1 completers applying only to SLIYS 2 | Selection: About 80 high-school students are selected through demonstrated mathematical thinking in the problem set, academic context, recommendation, transcript, and short answers. PROMYS does not publish the current applicant count or acceptance rate. Application materials: One recommendation | Selection: GSTEM admits 40 current juniors. Review is competitive and considers academic work, essays, STEM activities, and one recommendation. Application materials: Four short essays; One recommendation from a teacher, advisor, or counselor; Separate data-science essay for Winston Data Scholarship consideration |
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| Official sources | Source 1 · checked 2026-08-21Source 2 · checked 2026-08-21Source 3 · checked 2026-08-21Source 4 · checked 2026-08-21 | Source 1 · checked 2026-08-20Source 2 · checked 2026-08-20Source 3 · checked 2026-08-20Source 4 · checked 2026-08-20Source 5 · checked 2026-08-20Source 6 · checked 2026-08-20 | Source 1 · checked 2026-08-22Source 2 · checked 2026-08-22Source 3 · checked 2026-08-22Source 4 · checked 2026-08-22Source 5 · checked 2026-08-22Source 6 · checked 2026-08-20 |
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