This is  list of math topics suggested by the GED® Testing Service:

 GED®  is a registered trademark of  the American Council on Education Free-Ed.Net is not affiliated with or endorsed by the American Council on Education Part I:  Solving Numerical Problems 1.1 Rational Numbers and Numerical Expressions 1.2 Solving Problems Involving Rational Numbers 1.3 Solving Problems Involving Proportions 1.4 Computing Perimeter, Circumference, and Area of Plane Figures 1.5 Computing the Volume and Surface Area of Prisms and Cylinders 1.6. Computing the Volume and Surface Area of Cones, Pyramids, and Spheres 1.7 Reading and  Interpreting Graphs and Charts 1.8 Measuring the Center of a Statistical Data Set 1.9 Using Sample Space and Probability Models to Interpret Data Part 2: Solving Algebraic Problems 2.1 Amplifying, evaluating, and writing linear expressions 2.2 Simplifying, evaluating, and writing polynomial expressions 2.3 Simplifying, evaluating, and writing rational expressions 2.4 Writing and solving linear equations 2.5 Writing and solving linear inequalities 2.6 Writing and solving quadratic equations 2.7 Graphing an equation in two variables on the coordinate plane 2.8 Solving problems requiring knowledge of slope; determining the equation of a line 2.9 Applying the slope criteria for parallel and perpendicular lines 2.10 Evaluating a function for a given point 2.11 Comparing functions in different presentations 2.12 Identifying feature of a function from graphs or tables. Your first objective is to make sure you are familiar with each of the topics listed below—and know how to apply the concepts with skill and confidence. Use  the Traditional Math Tutorials in our program to learn and refine these skills. You can build even more understanding and confidence by getting together with some study partners and taking turns role-playing a math tutor. Your second objective—a very, very close second—is to actually understand the concepts. It is one thing to crank out a solution to a quadratic equation, but quite another to actually understand what you are doing (and therefore put yourself in a position to solve problems you have never seen before). You should spend a great deal of time working in our math section, Thinking Mathematically.