| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Cost | Unconfirmed — check official site | Last year's cycle (2026): $5,518; 2027: Unconfirmed — check official site | Unconfirmed — check official site |
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| Financial aid | Unconfirmed — check official site | Last year's cycle (2026): 2026 need-based application and program assistance: Up to $5,564. Could assist with the $46 application fee and $5,518 program cost based on family income, family size and available funds; actual award not guaranteed.; 2027: Unconfirmed — check official site | Last year's cycle (2026): 2026 summer-course scholarship: Amount: Unconfirmed — check official site. Ten campus and 25 online awards were offered; benefit amount/coverage was not fully quantified in the cited terms.; 2027: Unconfirmed — check official site |
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| Expenses and aid conditions | Unconfirmed — check official site | Last year's cycle (2026): 2026 COSMOS application fee: $46. Nonrefundable; pending fee-waiver review could change when or whether payment was required.; Credit-card transaction fee on program payments: Amount: Unconfirmed — check official site. Approximately 2.5% when paying program costs by credit card; application fee exempt.; 2026 need-based application and program assistance: Up to $5,564. Could assist with the $46 application fee and $5,518 program cost based on family income, family size and available funds; actual award not guaranteed.; Full-financial-aid attendance deposit: $200. Required only for admitted students offered full aid and refunded to the legal guardian after successful completion.; 2027: Unconfirmed — check official site | Last year's cycle (2026): Enrollment deposit after acceptance: Amount: Unconfirmed — check official site. 30% of course fee, nonrefundable.; 2026 summer-course scholarship: Amount: Unconfirmed — check official site. Ten campus and 25 online awards were offered; benefit amount/coverage was not fully quantified in the cited terms.; 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 | Unconfirmed — check official site | Grades 9–12 (provider uses rising grades) | Unconfirmed — check official site |
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| Additional eligibility | Requirement: American Legion Boys State gives selected high-school students hands-on experience creating and running a mock state government. Schools and local Legion posts usually recommend, interview and select delegates. Requirements, dates and costs are set by the state programme.
Two delegates from each Boys State programme may advance to Boys Nation in Washington, D.C. The national 2027 session is announced for summer, but that is not a shared Boys State application deadline or venue. Sponsorship and family-paid costs must be checked locally. | Residency: Attend high school in person in California; Requirement: Be rising into grade 9, 10, 11 or 12 for the program fall year; Requirement: Attend high school in person in California; Requirement: Demonstrate academic excellence and preparation for the selected STEM cluster; Requirement: Complete cluster-specific course prerequisites; Requirement: Live on the host UC campus for the full program; Requirement: Be a first-time COSMOS participant; Exclusion: Students not attending a California high school in person; Exclusion: Students who previously attended any COSMOS program; Exclusion: Applicants outside the rising-grade 9-12 range; Exclusion: Applicants unable to live on campus for the full program; Exclusion: Late application, supporting, payment or admission materials; Exclusion: Assuming a 3.5 GPA is an absolute statewide minimum rather than the published typical profile | Residency: Worldwide applicants; campus students must arrange lawful travel/residence in Italy; Requirement: Select a module matching current Latin/Greek level: part 1 beginner, part 2 after part 1/equivalent, or advanced seminar after stronger prior study; Requirement: Commit to the full intensive live schedule, tutor work, assignments, and substantial independent study; Requirement: For campus modules, reside at Villa Falconieri and follow Latin/Greek immersion, housing, conduct, meal, excursion, and schedule rules; Requirement: Receive acceptance before sending the required 30% deposit; Requirement: Provide travel/visa/insurance/health/guardian documentation required for Italy and campus residence where applicable; Exclusion: Treating the program as high-school-only or assuming a stated universal age range; Exclusion: Entering intermediate/advanced modules without the required prior language preparation; Exclusion: Using nonclassical languages in class contrary to immersion rules or being unable to meet the intensive schedule; Exclusion: Assuming a course will run if the 20-student minimum is not met; Exclusion: Assuming ECTS automatically transfers, or that completion guarantees admission, scholarship, recommendation, degree credit, internship, or job |
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| Session dates or duration | Unconfirmed — check official site | Catalog terms: 4 weeks; 2027: Unconfirmed — check official site | Catalog terms: 1–4 weeks; 2027: Unconfirmed — check official site |
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| Format | Unconfirmed — check official site | In person | Online / 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 | Unconfirmed — check official site | Davis, California, Irvine, California, Los Angeles, California, Merced, California, San Diego, California, Santa Cruz, California, UC Davis, UC Irvine, UCLA, UC Merced, UC San Diego, UC Santa Cruz | Frascati, Villa Falconieri near Rome for compulsory-residential modules; live online worldwide |
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| Selection and application | Unconfirmed — check official site | 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: One personal statement; One required teacher recommendation, with two recommended | Selection: Seats were limited, courses required at least 20 students to run, and placement depended on language preparation; no applicant count or acceptance rate was published. |
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| Official sources | Source 1 · checked 2026-10-09Source 2 · checked 2026-10-09Source 3 · checked 2026-08-21 | 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 2026-08-22Source 7 · checked 2026-08-20 | Source 1 · checked 2026-08-20Source 2 · checked 2026-08-20Source 3 · checked 2026-08-20Source 4 · checked 2026-08-20 |
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