| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
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| Cost | Unconfirmed — check official site | Unconfirmed — check official site | Last year's cycle (2026): $5,518; 2027: Unconfirmed — check official site |
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| Financial aid | Unconfirmed — check official site | 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 |
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| Expenses and aid conditions | Unconfirmed — check official site | 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 |
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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 | Unconfirmed — check official site | Grades 9–12 (provider uses rising grades) |
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| Additional eligibility | Minimum age 16; Citizenship: Legally eligible to work in the United States; under-18 participants must obtain a school work permit after acceptance; Residency: San Diego County resident; Residency: Most recent high-school semester completed at a named REACH partner school/program; Requirement: Be at least 16 by the first day of pre-program boot camp; Requirement: Have at least a 3.0 GPA; Requirement: Complete at least one year each of high-school chemistry and biology; Requirement: Commit to approximately 40 hours weekly and miss no more than three days; Requirement: Attend the parent/guardian welcome meeting and three-day boot camp; Requirement: Provide personal transportation to and from Scripps Research; Exclusion: Students outside the nine named partner schools/programs were ineligible for 2026; Exclusion: Prior REACH summer internship participants may not repeat; Exclusion: The separate SRTI internship's broader local eligibility does not apply to REACH; Exclusion: Housing and general transportation support are not offered on the public page | Requirement: Normally not have completed high school before class begins; Requirement: Demonstrate the mathematical maturity of an advanced high-school student; Requirement: Be prepared for intensive college-level lectures, problems, independent work, and mathematical communication; Requirement: Meet any future course-specific readiness or scheduling requirements; Exclusion: Assuming grades 9-12 is a fixed rule; sufficiently prepared middle-school students may apply; Exclusion: Assuming competition mathematics, prior research, a published prerequisite course, or Bay Area residence is required; Exclusion: Assuming admission, financial aid, academic credit, publication, recommendation, or a research result is guaranteed | 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 |
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| Session dates or duration | Catalog terms: 7–8 weeks; 2027: Unconfirmed — check official site | Unconfirmed — check official site | Catalog terms: 4 weeks; 2027: Unconfirmed — check official site |
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| Format | In person / Online | Unconfirmed — check official site | In person |
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| Housing and supervision | Non-residential. Supervision and housing details: Unconfirmed — check official site | Unconfirmed — check official site | Residential. Supervision and housing details: Unconfirmed — check official site |
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| Location | La Jolla, California, Scripps Research campus for boot camp/laboratory internship; virtual interview and parent/guardian welcome meeting | 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 |
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| Selection and application | Selection: Only students at nine partner schools/programs were eligible in 2026. Finalists were interviewed and placements depended on laboratory/mentor capacity; no applicant total, cohort size or acceptance rate is published. Application materials: Brief virtual interview if selected as a finalist | Selection: Applicants must persuade Euler Circle that they are prepared and a good instructional fit; Euler Circle says ordinary seat scarcity usually is not the main constraint and does not publish acceptance statistics. | 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 |
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| Official sources | Source 1 · checked 2026-08-21Source 2 · checked 2026-08-21Source 3 · checked 2026-08-21 | Source 1 · checked 2026-10-12Source 2 · checked 2026-08-20Source 3 · checked 2026-08-20Source 4 · 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 2026-08-22Source 7 · checked 2026-08-20 |
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