| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Cost | Unconfirmed — check official site | $3,445–$7,195 (2027 cycle) | $5,793 (2027 cycle) |
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| Financial aid | Limited scholarship assistance: Amount: Unconfirmed — check official site. Provided primarily through mentoring organizations. (2027 cycle) | Sibling discount (5% of tuition): Amount: Unconfirmed — check official site. Discounts cannot be combined.; Educator-parent discount (10% of tuition): Amount: Unconfirmed — check official site. Requires proof of full-time employment as a primary or secondary educator.; Scholarships through partner organizations: Amount: Unconfirmed — check official site (2027 cycle) | 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) |
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| Expenses and aid conditions | Application fee (non-refundable): $100. Not applied toward tuition.; International Registration Fee for students living outside the U.S.: $239–$379. $379 for residential students and $239 for commuter students; includes U.S. health insurance coverage.; Limited scholarship assistance: Amount: Unconfirmed — check official site. Provided primarily through mentoring organizations. (2027 cycle) | Application fee: $95. Non-refundable.; Enrollment deposit: $700; Sibling discount (5% of tuition): Amount: Unconfirmed — check official site. Discounts cannot be combined.; Educator-parent discount (10% of tuition): Amount: Unconfirmed — check official site. Requires proof of full-time employment as a primary or secondary educator.; Scholarships through partner organizations: Amount: Unconfirmed — check official site (2027 cycle) | 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) |
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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 7–12 and first-year college (provider uses rising grades) | Grades 9–12 (provider uses rising grades) |
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| Additional eligibility | Requirement: Open to grades 9–12 | Requirement: Open to rising grades 7–13; Requirement: High school trips: entering 9th grade through graduating 12th grade; Requirement: Middle school trip: entering 7th grade through graduating 8th grade | 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) |
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| Session dates or duration | Catalog terms: 2–6 weeks; 2027: Unconfirmed — check official site | Catalog terms: 1–3 weeks; 2027: Unconfirmed — check official site | Catalog terms: 4 weeks; 2027: Unconfirmed — check official site |
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| Format | In person | In person | In person |
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| Housing and supervision | 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 | Eugene, New Haven, Los Angeles, Hanover, Ann Arbor, Washington, Berkeley, Austin, Santa Barbara, Vancouver, Oxford, Cambridge, OR, CT, CA, NH, MI, DC, TX | Program-specific international and U.S. territory itineraries; current departures use Houston, New York, Miami or self-booked flights | Davis, Irvine, Los Angeles, Merced, San Diego, Santa Cruz, CA |
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| Selection and application | Selection: Qualified students are admitted first come on a rolling basis until program, course and housing capacity fills. Highly specialized partner programs may have additional selection rules. | Selection: Capacity- and fit-based enrollment rather than a single selective cohort. A completed application and payment reserve a space subject to trip availability, documentation, health and conduct requirements. | 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) |
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| Official sources | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-10-24Source 5 · checked 2026-08-22 | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-08-20 | 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 |
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