Art of Problem Solving

What it is

A math publisher and online school for students in grades 5-12, with textbooks such as Prealgebra, Introduction to Algebra, Introduction to Counting & Probability, Introduction to Number Theory, and Introduction to Geometry, followed by intermediate and calculus texts. The books typically pose problems before explaining a method, and students work through them alone or alongside a live online class. AoPS also runs the free Alcumus practice tool and publishes Beast Academy for younger students.

Written by the Homebuilt team from the publisher’s own materials, checked September 2026. Prices and editions change, so confirm with the publisher. Learn more: Art of Problem Solving home · AoPS store · AoPS Prealgebra book page