Some online mathematics courses include College Algebra, Trigonometry, Multivariable Calculus, Algebraic Combinatorics, Introduction to Statistics, Precalculus and Calculus One, as of 2015. The courses available vary by institution and semester.
The University of Illinois teaches undergraduate mathematics classes online for students outside the university. Courses range from an introductory level to advanced courses, including Preparation for Calculus and Vector Calculus. Massachusetts Institute of Technology has free, self-guided advanced mathematics courses online, ranging from advanced calculus courses to chaos theory, topology and quantum field theory. Coursera provides free advanced mathematical courses, applied programs and theory courses, such as Introduction to Mathematical Thinking, Personal Finance and Statistical Inference.