The GED Tests cover the same subjects that people study in high school. The five subject areas include: Language Arts, Writing and Language Arts, Reading (which, together, are equivalent to high school English), Social Studies, Science, and Mathematics. You will not be required to know all the information that is usually taught in high school. However, across the five tests you will be tested on your ability to read and process information, solve problems, and communicate effectively. Some of the states in the U.S. also require a test on the U.S. Constitution or on state government. Check with your local adult education center to see if your state requires such a test.