Updated November 2026
TL;DR
The Ross Mathematics Program is a six-week residential summer program that uses number theory to teach high school students proof-based mathematics. It runs at Otterbein University in Columbus, Ohio, and Rose-Hulman Institute of Technology in Terre Haute, Indiana. Ross accepted about 15% of complete applications in 2023, charges a $7,500 program fee and aims to give every admitted student the aid they need. The 2027 dates and deadline aren't posted yet; the 2026 deadline was March 8 and the program ran June 14 to July 24.
Competition math trains you to solve unfamiliar problems fast. The Ross Mathematics Program asks something different: why a result is true, where an argument breaks and how to write each step so someone else can check it. Founded by mathematician Arnold Ross in 1957, it spends the whole summer on a single subject, the integers and their properties, so you go deep rather than wide.
Comparing math options? See our lists of the best math summer programs for high school students, math research opportunities and math internships for high school students.
How much does the Ross Mathematics Program cost, and when is it?
The Ross Mathematics Program fee is $7,500, covering six weeks of housing and meals plus the cost of running the courses, and financial aid is available. Ross hasn't posted 2027 dates yet. Based on the last cycle, expect the program to run from about mid-June to late July 2027, with applications due around early March 2027.
|
Detail |
What you need to know |
|
Sites |
Otterbein University, Columbus, Ohio, and Rose-Hulman Institute of Technology, Terre Haute, Indiana |
|
Length |
Six weeks, residential |
|
2026 dates |
June 14 to July 24, 2026 at both sites (2027 not yet posted) |
|
Cost |
$7,500 program fee; need-based aid for accepted students |
|
Eligibility |
Nearly all first-year students are 15 to 18; some exceptionally mature 14-year-olds and recent graduates; international students welcome |
|
Acceptance rate/cohort size |
About 15% of complete applications (2023); about 60 first-year students per site |
|
Application deadline |
2026: March 8 (2027 expected around early March) |
|
Decisions |
2026: targeted for mid-April |
Who can apply to the Ross Mathematics Program?
Ross is built for pre-college students who've done well in standard high school math and want to explore more advanced ideas, and nearly all first-year students are 15 to 18. The Ross FAQ says it admits some exceptionally mature 14-year-olds in rare cases, plus some students who've already graduated high school. International students are welcome if they have reasonable fluency in English, and Ross admits several each year.
Ross is highly selective: about 15% of applicants with complete applications were accepted in 2023, and each site expects about 60 first-year students, supported by 12 to 15 counselors. You don't need competition results. If Ross doesn't work out, Ladder Internships places high school students in grades 9 to 12 worldwide in remote start-up internships, including in data, finance and AI.
What will you study at the Ross Mathematics Program?
You study number theory: "Ross students spend the entire summer focusing their attention on integers and their properties." The curriculum is a connected series of problem sets that take you from numerical examples to patterns, conjectures and finally formal proofs. Some problems ask you to prove or disprove a claim, then fix it so it becomes true. The Math at Ross page describes the approach.
You hand your written proofs to a counselor, who reads them and sends them back for revision until the argument holds up. That loop of writing, feedback and rewriting is the core of the summer, and it's the same habit mathematicians use in research.
6 things to know before you apply to the Ross Mathematics Program
1. The Ross Mathematics Program teaches proofs through one subject
Instead of surveying many topics, Ross spends six weeks on number theory so you learn how mathematics is built. It's a different kind of challenge from contests: speed matters much less than getting an argument right and explaining it clearly. If you love math competitions but have never written a full proof, expect a real adjustment in the first week.
2. The Ross Mathematics Program application problems carry the most weight
Ross reviews your essays, video, teacher recommendation and transcript, but the math problems are where you show how you think. Staff will answer questions about terminology or wording, but Ross says it "will not provide hints." Start early and show your reasoning: a clear partial argument tells reviewers more than a bare final answer.
3. The Ross Mathematics Program runs at two U.S. campuses
First-year students attend either Otterbein University in Columbus, Ohio, or Rose-Hulman Institute of Technology in Terre Haute, Indiana. Both sites ran on the same dates in 2026, June 14 to July 24. You live in a campus dorm, usually with a roommate, and take care of your own room, laundry and schedule.
4. Ross admits about 15% of complete applications
In 2023, about 15% of applicants with complete applications were accepted, with about 60 first-year students expected at each site. That's one year's figure, not a fixed rate, but it tells you to treat Ross as a reach and apply to other summer programs too.
5. The Ross Mathematics Program costs $7,500, with need-based aid
Ross asks each student for a $7,500 program fee and encourages accepted students with financial need to apply for aid. The application and financial aid page says the program aims to support every accepted student who needs help, and it points families to outside sources such as Mu Alpha Theta, the Davidson Institute and the Jack Kent Cooke Foundation.
6. Most of your day at Ross is unstructured math
You must attend a daily number theory lecture and a daily family group discussion, about three hours a day combined. The rest of the day is yours, and most students spend it on problem sets, optional talks and arguing about proofs with each other. Ross also asks students to stay off their phones and other devices, so plan for a focused, mostly pencil-and-paper summer.
Is the Ross Mathematics Program worth it for college applications?
Yes, if math is your passion: a selective program with a long history, plus six weeks of proof-writing, shows colleges real depth in one subject. Ross isn't a college course and doesn't guarantee an admissions advantage. What helps is what you can show afterward, such as a proof you're proud of, advanced coursework you took next or research you started.
Because so few students get in, line up other options while you wait for mid-April decisions. Ladder Internships places high school students in remote, eight-week start-up internships, where they work on a real project with a company coach, in fields such as AI, data and finance, with full financial aid available.
How do you apply to the Ross Mathematics Program?
Ross posts its application and problem set on its application page; for 2026 it was due March 8, with decisions targeted for mid-April. A complete application includes short essay responses, a short video, one teacher recommendation, your school transcript and written work on a set of challenging math problems. Ross says late applications might not get full consideration, so submit on time.
|
Step |
Last cycle (2026) |
2027 (projected) |
|
Application deadline |
March 8, 2026 |
Usually around early March |
|
Decisions |
Mid-April 2026 |
Usually around mid-April |
|
Program dates |
June 14 to July 24, 2026 |
Usually mid-June to late July |
Check the Ross site in winter for the 2027 problem set, and give yourself weeks, not days, to work through it.
Common questions about the Ross Mathematics Program
What is the Ross Mathematics Program acceptance rate?
About 15% of applicants with complete applications were accepted in 2023, according to Ross. Each site expects about 60 first-year students.
What does a day at the Ross Mathematics Program look like?
You attend a daily number theory lecture and a family group discussion led by a counselor, about three hours combined. The rest of the day goes to problem sets, revising proofs and optional talks.
How hard are the Ross application problems?
They're meant to be challenging, not routine school exercises. Ross won't give hints, so start early and show your reasoning clearly, even where your solution is incomplete.
Can international students apply to the Ross Mathematics Program?
Yes. Ross accepts several international students each year and requires reasonable English fluency. If you'd rather build experience from home, Ladder Internships runs remote, eight-week start-up internships for high school students worldwide, at 5 to 10 hours a week, with a company coach and full financial aid available. The next deadline is November 15, 2026, for the Winter I cohort starting December 7, 2026.
Contact us at contact@ladderinternships.com if you have any questions!