I need help fellas

For the majority of my life i slacked off like a nig and was a sad coomer. it wasn't until the age of 18 i started acting hu-white. I'm on my last GED module (math) and have 20 days up until the test. I'm trying to figure out the best strategy for learning, reviewing, and effectively remembering a subject. It consists of Algebra 1, 2, Geometry, as well as Graphs and Functions. I know i'll pass, but i need to slave away like a chinese student for the next 20 days.

Any advice for what i should do to get through this struggle?