Where is the best place for me to learn the material that will be on a GED test?

Tweet

I've passed three of the GED tests so far. Writing, reading, and math. Although the practice science and social studies tests seem very hard to me. Even after reading the problem help I don't understand many of the questions. So I don't really know how I should go about studying for these two remaining tests. What do you think would be the best way for me to study these two tests?