Resources for curious minds
The Learning Hub
Explore our classes, sample problems, and curriculum - plus a curated collection of resources we love and recommend.
our curriculum
A unique curriculum, built over 15 years
Prime Factor's curriculum is built in-house from over a decade
of teaching.
Across eight levels and three trimesters per
year, it emphasizes problem-solving, reasoning, and
communication over memorization.
Published by our founder
The books behind our curriculum
Written by Anna Burago and published by the American Mathematical Society, these books are used in Prime Factor classes and in math circles across the United States.
Mathematical Circle Diaries, Year 1
Complete curriculum for grades 5–7. 29 weekly lessons with full lecture notes, problem sets, solutions, and contests.
Mathematical Circle Diaries, Year 2
Complete curriculum for grades 5–7. 29 weekly lessons with full lecture notes, problem sets, solutions, and contests.
try our problems
Sample problems from our classes
Want to see how we teach? Each grade level has two sample problem sets — one from the start of the year and one from later. These are real homework problems we give to our students.
Grades 2 - 4
Beginners & Junior Circle
Visual puzzles, pattern problems, and beginning logical reasoning for our youngest students.
Grades 5 - 7
Junior 3 & Intermediate 1
Combinatorics, geometry, and number theory problems that develop deeper mathematical reasoning.
Grades 8-10
Intermediate 2 & 3
Olympiad-style problems, proofs, graph theory, and computer science foundations.
Free for everyone
Material to share
A growing collection of articles, talks, and resources from our teachers — free to read, share, and use with your own students.
ARTICLE
How to introduce proofs in elementary school
Anna Burago shares strategies for teaching mathematical reasoning to young students.
Read Article
VIDEO
Math circle methodology — a teacher's guide
A 25-minute talk explaining how discussion-based math classes work in practice
Watch Video
GUIDE
Preparing for AMC 8 — a parent's guide
What the AMC 8 is, who should take it, and how to prepare without burnout.
Read Guide
PRESENTATION
Why we don't use textbooks
A presentation on building your own curriculum from problems rather than following a book.
View SlidesCurated by our teachers
Books we like
Math books we love and recommend — for curious students, parents, and teachers. Most are appropriate for middle school and up.
The Art of Problem Solving
Classic series for serious math students preparing for competitions.
The Art of Problem Solving
Classic series for serious math students preparing for competitions.
The Art of Problem Solving
Classic series for serious math students preparing for competitions.