| Application deadline | Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
|---|
| Cost | Unconfirmed — check official site | $5,793 (2027 cycle) | Unconfirmed — check official site |
|---|
| Financial aid | Unconfirmed — check official site | 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) | Unconfirmed — check official site |
|---|
| Expenses and aid conditions | Unconfirmed — check official site | 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) | Unconfirmed — check official site |
|---|
| Stipend or pay | Catalog terms: Summer I fellowship award/stipend: $4,000; 2027: Unconfirmed — check official site; Catalog terms: Summer II fellowship award: $4,000; 2027: Unconfirmed — check official site | Unconfirmed — check official site | Unconfirmed — check official site |
|---|
| Eligibility | Grades 10–12 when applying; check the provider's rules for graduating seniors | Grades 9–12 (provider uses rising grades) | Grades 8–12 (provider uses rising grades) |
|---|
| Additional eligibility | Requirement: Open to students currently in grades 10–12 when applying; Requirement: Family annual income must not exceed 300% of the Federal Poverty Guidelines, documented by a 1040, free/reduced lunch, SNAP/WIC, TRIO participation or SAT/ACT fee-waiver eligibility; Requirement: Must have completed at least one high school chemistry course; Requirement: Must demonstrate an interest in science and/or chemistry; Requirement: Students under 18 need a parent or guardian's permission; Requirement: In the 2026 cycle, graduating high school seniors were also eligible | 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) | Residency: Metro Nashville Public Schools (MNPS) students; Requirement: Open to grades 8–12; Requirement: SSMV: apply in 8th grade and attend a district-operated MNPS high school; Requirement: SHIRE: rising junior or senior in the Interdisciplinary Science and Research (ISR) Program at John Overton, Stratford STEM or Hillsboro High School; Requirement: REHSS: rising senior in the ISR Program at Stratford STEM, John Overton or Hillsboro High School, at least 16 at the start of the program |
|---|
| Session dates or duration | Catalog terms: 8–10 weeks; 2027: Unconfirmed — check official site | Catalog terms: 4 weeks; 2027: Unconfirmed — check official site | Catalog terms: 6–208 weeks; 2027: Unconfirmed — check official site |
|---|
| Format | In person / Online | In person | In person |
|---|
| Housing and supervision | Non-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 |
|---|
| Location | Participating university, government, and industry research sites; virtual projects may also be offered | Davis, Irvine, Los Angeles, Merced, San Diego, Santa Cruz, CA | Nashville, TN |
|---|
| Selection and application | Selection: Local coordinators select among financially and academically eligible applicants based on performance, science interest, full-summer availability, site capacity/budget, safe commute, and mentor/project fit. ACS publishes no single current acceptance rate. | 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: SSMV is limited to 26 students per grade. ISR is not academically selective but is school-restricted and rigorous. SHIRE considers grades, schedule conflicts and ISR-teacher input. REHSS is restricted to current ISR rising seniors. Application materials: REHSS: curriculum vitae or resume, essays and two recommendations (one from the ISR teacher), with grades and course rigor considered |
|---|
| Official sources | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · 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 | 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 2026-08-22Source 9 · checked 2026-08-22 |
|---|