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Start your 2025-2026 journey
Classes start on September 20th
Enrollment

How to enroll in our program?

Step 1 Choose classes.

Step 2 Request the online placement test.

We will give you the placement recommendation after the test.

Step 3 Fill in registration form and pay for the class to reserve your spot.

Who needs testing?

We want to make sure our students are appropriately challenged in our classes, and at the same time are comfortable with the level of the material.

All new students need to take placement test, with the exception of Chess Read more...

Who doesn't need to test?

Students who have already taken our classes don't need testing, unless recommended by the teacher.

Returning students are welcome to fill in the registration form and pay the trimester tuition.

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TESTIMONIALS
“I was a student in Prime Factor Math Circle, taking math classes for at least 5 years there and a year of programming as well. The math classes helped me a ton in math competitions since the math that is taught in Prime Factor isn't your standard school math, it focuses on logic and proofs!
from a fromer student now at UW
The goal of math enrichment programs such as Prime Factor … is to introduce students to mathematical ideas that they may never see in school, even at the university level. My son, a third grader, has participated in Prime Factor programs for the past two years. Each week I look at his homework and say to myself “I wish I could have solved problems like this when I was a child.“
from Junior Math Circle 1, grades 3-4 parent, PhD in Mathematics
I am currently pursuing a bachelor's degree at the University of Washington, after having enrolled in Prime Factors programs throughout elementary to high school, in math and computer science. One reason that I stayed in their programs for so long was their unique approach to every subject. In math classes, for example, the emphasis was … on creativity and logical reasoning. I learned techniques which were never offered in school. If I had simply wanted to enrich my understanding of the subjects I learned in school, I would have hired a tutor, but I felt that Prime Factor offered me a distinctive and new set of skills that I couldn’t have accessed elsewhere.
from a former student
At Prime Factor … they engaged with challenging topics such as combinatorics, number theory, invariants, mathematical induction, graph theory, and combinatorial game theory … While not strictly necessary for success in standard school math classes, these topics are crucial to many math-, science-, and technology-related professions, including engineering, software development, and quantitative finance. … Prime Factor stands apart.. It focuses on building logical thinking and creative problem-solving skills… It is an enrichment program that cultivates the kind of analytical thinking and curiosity that can take years to develop—qualities that are highly valued in technical careers.
from Junior Math Circle 2, grades 4-5 parent