Free math courses are available online and don't require students to register or pay tuition, but most of these courses also don't lead to college credit. Fee-based classes can prepare students to earn alternative forms of credit. Study.com offers this form of online math classes with short, engaging video lessons, transcripts, and self-assessment quizzes available to registered members that can lead to college credit.

Students interested in math can check out the Math 102: College Math course and find chapters on these topics and more:

Linear Equations - Examine standard form, slope and the system of equations and learn how to graph and write an equation.

Complex and Imaginary Numbers - Learn how to add, subtract, multiply and divide complex numbers.

Properties of Functions - Find out about conditions for a function, transformations, domain and range and inverse functions.

Probability and Statistics - Learn how to calculate percent increase, mean, median and range while learning about standard deviation, probability of complementary events and permutations.

Another option for math students is Study.com's Math 101: College Algebra course, which includes such topics as:

Matrices and Absolute Values - Learn how to evaluate absolute value expressions and solve and graph absolute value equations.

Exponents and Polynomials - Get details on the five main exponent properties, rational exponents and using synthetic division to divide polynomials.

Exponentials and Logarithms - Find out about exponential functions and logarithmic properties and practice with the sample problems in this chapter.

Study.com also offers Math 104: Calculus. Some of the chapters in this course include: