| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Cost | $5,793 (2027 cycle) | $2,500–$5,800 (2027 cycle) | Unconfirmed — check official site |
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| Financial aid | Need-based financial assistance for application and program costs: Amount: Unconfirmed — check official site. Based on family income, family size and available COSMOS resources. (2027 cycle) | Limited financial aid: Amount: Unconfirmed — check official site. Apply with the Financial Aid Application. (2027 cycle) | Unconfirmed — check official site |
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| Expenses and aid conditions | Application fee: Amount: Unconfirmed — check official site. Non-refundable; fee waivers can be requested.; Need-based financial assistance for application and program costs: Amount: Unconfirmed — check official site. Based on family income, family size and available COSMOS resources. (2027 cycle) | Application fee: $70. Non-refundable.; Limited financial aid: Amount: Unconfirmed — check official site. Apply with the Financial Aid Application. (2027 cycle) | Last year's cycle (2026): 2026 registration fee for accepted students: $125. Non-refundable; charged only after acceptance.; 2027: 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 (provider uses rising grades) | Grades 7–12 (provider uses rising grades) | Grades 9–11 (provider uses rising grades) |
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| Additional eligibility | Residency: California high school students only; Requirement: Open to rising grades 9–12; Requirement: Demonstrated academic excellence (a typical COSMOS student has a GPA of 3.5 or above) | Requirement: Open to rising grades 7–12; Requirement: Course minimums vary: Physics of the Electric Guitar is for rising 8th graders and older, Fun with DNA is for rising 7th and 8th graders, and the Piano Program is for intermediate and advanced pianists ages 11-18 | Residency: US; Requirement: Open to rising grades 9–11; Requirement: Cumulative unweighted GPA of at least 3.0; Requirement: Taking or have taken science and math courses |
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| Session dates or duration | Catalog terms: 4 weeks; 2027: Unconfirmed — check official site | Starts June 27, 2027; Ends July 24, 2027; 1–4 weeks (2027 cycle) | Last year's cycle (2026): Starts July 19, 2026; Ends July 24, 2026; 2027: Unconfirmed — check official site |
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| Format | In person | In person | In person |
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| Housing and supervision | Residential. Supervision and housing details: Unconfirmed — check official site | Residential. Supervision and housing details: Unconfirmed — check official site | Residential. Supervision and housing details: Unconfirmed — check official site |
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| Location | Davis, Irvine, Los Angeles, Merced, San Diego, Santa Cruz, CA | Lakeville, CT | Bloomington, IN |
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| Selection and application | Selection: Each of six campuses accommodates roughly 160-200 students, and clusters typically enroll 20-25 with a commonly reported 5:1 student-to-faculty ratio. Admissions are competitive and based on academic merit relative to the selected topic, but applicant count and statewide acceptance rate were not published. Application materials: Online application with one personal statement; One teacher recommendation (two recommended) | Selection: Rolling, course-specific admission; Hotchkiss does not publish a program-wide acceptance rate. Application materials: Two teacher recommendations | Selection: Completed July 19–24, 2026 programme; next-cycle requirements and outcomes are not announced. Application materials: Recommendation from a science teacher; Recommendation from a math teacher |
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| Official sources | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-08-22Source 5 · checked 2026-08-22Source 6 · checked 2026-08-22Source 7 · checked 2026-08-20 | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-10-24Source 5 · checked 2026-10-24Source 6 · checked 2026-10-24Source 7 · checked 2026-10-24Source 8 · checked 2026-10-24Source 9 · checked 2026-10-24Source 10 · checked 2026-10-24Source 11 · checked 2026-10-24Source 12 · checked 2026-08-21Source 13 · checked 2026-08-21 | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-08-20 |
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