The Art of Problem Solving (AoPS) is a mathematics eucation company founded by Richard Rusczyk in 2003. It writes and sells textbooks and online courses for middle school and high school students. The Art of Problem Solving and the Art of Problem Solving Foundation are not the same thing; the latter is a non-profit foundation created by Rusczyk to fund the Art of Problem Solving as well as other mathematical projects, and the former is a company.