When I took the entrance exam for college, I got a 29 in the math section (for comparison, I had 99 in reading comprehension and 99 on writing). I had mistakenly thought the entrance exam focused on pre-algebra, and it was very algebra heavy. Whoops. A couple of months before I started college, I worked through Khan Academy, literally starting with 3rd or 4th grade math. My math skills weren't horrible, but I had forgotten so much. I was placed into Intermediate Algebra, and through lots and lots (and lots) of practice tests, Khan Academy, YouTube videos, I got an A. It was actually quite enjoyable after a while, but College Algebra was not!! Once again, lots and lots of practice, same websites and videos, and many tears, I got an A. I got an A in statistics too. If I had gone straight into College Algebra, it would've been a horrific semester and there is no way I could've got an A. I was very thankful for that intermediate class, and all the foundation work I did with Khan Academy.