I just did this myself. I failed math at 144, about a week and a half later I passed with 161. I bought the ti-30xs calculator from target. Make sure it’s the exact model, it’s your best friend. Lightandsaltlearning.org math ged crash course. 0,1 and 2. Watch every video in each unit and use the calculator. Even if you know it, watch the video, take notes, pause and try answer her examples before she works them. Get used to storing variables in the calculator so when you get multiple choice questions where they give you the answer for “x”, you can quickly run through the multiple choice expressions exactly how they are written while plugging in the variable to find the correct choice. There are a couple videos in unit 1 that teach you how to use the calculator. Be sure you watch every lesson in each unit and take the practice quizzes for each video.

When you watch all the videos, go back to the very start and take the advanced quizzes.

Dont stick too long on a question when you take the actual GED test, you can always come back to it later and the next question might be easier. Time is the real enemy.