| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Cost | Last year's cycle (2026): $5,518; 2027: Unconfirmed — check official site | Unconfirmed — check official site | Last year's cycle (2026): $1,000; 2027: Unconfirmed — check official site |
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| Financial aid | 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 | Unconfirmed — check official site | Last year's cycle (2026): Full and partial need-based scholarships: Amount: Unconfirmed — check official site. Availability and award amounts depend on program eligibility, academic merit, demonstrated need, institutional membership funds, and donations.; 2027: Unconfirmed — check official site |
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| Expenses and aid conditions | 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 | Unconfirmed — check official site | Last year's cycle (2026): Full and partial need-based scholarships: Amount: Unconfirmed — check official site. Availability and award amounts depend on program eligibility, academic merit, demonstrated need, institutional membership funds, and donations.; 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 9–12; Grade timing: Unconfirmed — check official site | Grades 9–12; Grade timing: Unconfirmed — check official site |
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| Additional eligibility | 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 | Requirement: Apply according to grade entering in the fall; Requirement: Meet the selected course's Emerald, Magenta, or Indigo tier; Requirement: Provide qualifying recent test scores, prior CTD course history, or an admission portfolio; Requirement: Complete any course-specific academic prerequisites; Requirement: Demonstrate English proficiency through approved testing when required; Exclusion: Course eligibility varies and admission is not universally open; Exclusion: Grade-acceleration requests are rarely approved; Exclusion: International students may face separate language, visa, travel, and residential requirements | Requirement: Be a high-school student in the applicable cycle; Requirement: Have completed at least one year of Latin; Requirement: Know enough English for grammar explanation and discussion; Requirement: Provide availability that can be matched to a live section; Requirement: Have the required computer, internet, headset, webcam, and Zoom access; Exclusion: Complete beginners are directed to a separate ten-week Telepaideia beginner course; Exclusion: Enrollment does not guarantee a particular section time; if Paideia cannot match availability, it promises a refund; Exclusion: Exact 2027 grade, age, prerequisite, and availability rules are not posted |
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| Session dates or duration | Catalog terms: 4 weeks; 2027: Unconfirmed — check official site | Catalog terms: 1–3 weeks; 2027: Unconfirmed — check official site | Last year's cycle (2026): Starts July 6, 2026; Ends July 18, 2026; 1.7 weeks; 2027: Unconfirmed — check official site |
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| Format | In person | In person | Online |
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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 | Non-residential. Supervision and housing details: Unconfirmed — check official site |
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| Location | 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 | Evanston, Illinois | Live Zoom sections scheduled around participant time zones |
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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: One personal statement; One required teacher recommendation, with two recommended | Selection: Course-dependent academic admission using CTD eligibility tiers; applicants qualify through test scores, prior CTD coursework, or portfolio review, and courses may fill. Application materials: Teacher recommendation for portfolio applicants | Selection: Open to high-school Latin students meeting the prerequisite, subject to section capacity and schedule matching; no applicant count or acceptance rate is published. |
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| Official sources | 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 2026-08-21Source 2 · checked 2026-08-21Source 3 · checked 2026-08-20 | Source 1 · checked 2026-08-22Source 2 · checked 2026-08-22 |
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