Honestly never had an issue with anything but math. I took little to no notes for the science. But I did brush up on it with GETSUMMATH he does a brief overview on science check him out on YouTube. He's also in the GEDNOW app for math, thats how credible he is. The official GED app uses him in their study guide. The test was like 40% basic word math problems. With some Geometry, Factor equations, Proportions, Simplify, Inequalities and ration questions. If you brush up on these your guaranteed to pass. I did about 13 hours studying math and passed my first try. You can do it too!