COSMOS — California State Summer School for Mathematics and Science
Program · University of California · UC Davis, Irvine, San Diego, Santa Cruz, LA
Four-week residential STEM program across UC campuses, with clusters in specific topics.
Our take
For California students this is the one to get. Out-of-state applicants are admitted at a higher cost and lower odds.
“Helps an application” is our read on how much an admissions reader is likely to weigh it: Strong means getting in or placing is a real achievement, Solid means it shows real interest and effort, and Light usually means most students who apply and pay can attend. It’s our opinion, not a ranking from any college, and a light one can still be a great summer.
The details
- Run by
- University of California
- Type
- Program
- Format
- Residential, UC Davis, Irvine, San Diego, Santa Cruz, LA
- When
- Summer, 4 weeks
- Who can apply
- 8th–11th grade
- How hard to get in
- Competitive
- Cost
- $1k–5k, with financial aid or fee waivers
- Deadline
- Usually closes in February.
- Subjects
- Math, Physical Sciences, Life Sciences, Engineering
Dates, costs and rules change every year. Check the official site before you apply. Last checked October 18, 2026.
Questions
Is COSMOS — California State Summer School for Mathematics and Science worth it?
For California students this is the one to get. Out-of-state applicants are admitted at a higher cost and lower odds. On how much it helps a college application, we rate it strong.
How much does COSMOS — California State Summer School for Mathematics and Science cost?
It costs about $1,000 to $5,000. Financial aid or fee waivers are available. Check the official site for this year’s price.
When is the COSMOS — California State Summer School for Mathematics and Science deadline?
Usually closes in February. Exact dates change every year, so confirm on the official site.
Who can apply to COSMOS — California State Summer School for Mathematics and Science?
Students in 8th–11th grade. It is competitive.
Want a list picked for you?
Clarity Prep members get opportunities matched to their grade, interests and state in the app, plus a mentor who helps them decide what’s worth applying to and checks in every week until the applications are in.
Free tools: GPA calculator · chances calculator · college acceptance rates · essay grader