Begin with a basic math test so you know where your students' strengths and weaknesses are. The GED covers basic math, such as addition and subtraction, but also covers more complex math concepts, such as algebra. You only have limited time to teach GED math, so you don't want to waste any time on concepts your students don't know. You also do not want to bypass any concepts that your students do not know.
Plan your instruction based on the results for your particular group of adults. You must plan instruction separately for each of your classes because the teaching should be individualized.
Calculate the point where your instruction should begin based on the scores of your students' math tests. If all students have passed the addition and subtraction portions of your exam, and almost everyone got the multiplication portion correct, but most missed a few of the division questions, begin your instruction with division and continue on through fractions and algebra.
Provide additional instruction for students who are far behind the rest of the class. If you have students who are very far above other students, they can also work independently until the class has caught up with their ability level.