| Application deadline | Unconfirmed — check official site | December 15, 2026 (2027 cycle) | Unconfirmed — check official site |
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| Cost | $5,793 (2027 cycle) | Unconfirmed — check official site | Last year's cycle (2026): $2,200–$2,500; 2027: Unconfirmed — check official site |
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| Financial aid | 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 | Last year's cycle (2026): Partial need-based scholarship: $700. Limited number, awarded first come, first served; requested by emailing wcsi@wheaton.edu.; 2027: Unconfirmed — check official site |
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| Expenses and aid conditions | 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) | Last year's cycle (2026): Meals and snacks included with tuition: $0. Optional vending-machine or coffee-shop purchases are not included.; Shared dorm accommodation at residential camps: $0. Included only for overnight sessions.; 2027: Unconfirmed — check official site | Last year's cycle (2026): Partial need-based scholarship: $700. Limited number, awarded first come, first served; requested by emailing wcsi@wheaton.edu.; 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 and first-year college; Grade timing: Unconfirmed — check official site | Grades 10–12 (provider uses rising grades) |
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| Additional eligibility | 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) | Requirement: Be entering high school, currently in high school, or recently graduated; Requirement: Enroll for an available session and agree to the student code of conduct; Requirement: Advanced Business applicants must be returning Washington Business Week alumni; Exclusion: International students may attend but are not eligible for the two Renton Technical College credits | Requirement: Open to rising grades 10–12; Requirement: Strong academic record; Requirement: Students whose school does not teach primarily in English need a TOEFL score of 80+, IELTS 6.5+ or Duolingo 105+ |
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| Session dates or duration | Catalog terms: 4 weeks; 2027: Unconfirmed — check official site | Catalog terms: 1 week; 2027: Unconfirmed — check official site | Starts June 13, 2027; Ends June 26, 2027; 2 weeks (2027 cycle) |
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| Format | In person | In person | In person |
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| Housing and supervision | 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 | Davis, Irvine, Los Angeles, Merced, San Diego, Santa Cruz, CA | Washington State; exact 2027 campuses not announced | Wheaton, IL |
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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: Online application with one personal statement; One teacher recommendation (two recommended) | Selection: Enrollment rather than a selective application; spaces are limited | Selection: Admission uses a transcript and academic recommendation and course placement depends on preparation and space. Average 2026 class size was described as about 15, but applicant count, total cohort size, acceptance rate and course-level capacity were not published. Application materials: Academic recommendation (a more in-depth one for rising sophomores) |
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| Official sources | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-08-22Source 5 · checked 2026-08-22Source 6 · checked 2026-08-22Source 7 · checked 2026-08-20 | Source 1 · checked 2026-10-24Source 2 · checked 2026-08-20Source 3 · checked 2026-08-20Source 4 · checked 2026-08-20Source 5 · checked 2026-08-20 | Source 1 · checked 2026-10-24Source 2 · checked 2026-10-24Source 3 · checked 2026-10-24Source 4 · checked 2026-08-20 |
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