MathILy / MathILy-Er
Program · MathILy · Bryn Mawr, PA
Discovery-based advanced mathematics in "braided" strands of topics.
Our take
Serious and playful at once. MathILy-Er is the on-ramp if you are newer to proofs.
“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
- MathILy
- Type
- Program
- Format
- Residential, Bryn Mawr, PA
- When
- Summer, 5 weeks
- Who can apply
- 9th–11th grade
- How hard to get in
- Competitive
- Cost
- Over $5k, with financial aid or fee waivers
- Deadline
- Usually closes in April.
- Subjects
- Math
Dates, costs and rules change every year. Check the official site before you apply. Last checked October 18, 2026.
Questions
Is MathILy / MathILy-Er worth it?
Serious and playful at once. MathILy-Er is the on-ramp if you are newer to proofs. On how much it helps a college application, we rate it solid.
How much does MathILy / MathILy-Er cost?
It costs more than $5,000. Financial aid or fee waivers are available. Check the official site for this year’s price.
When is the MathILy / MathILy-Er deadline?
Usually closes in April. Exact dates change every year, so confirm on the official site.
Who can apply to MathILy / MathILy-Er?
Students in 9th–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.
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