When I was in grade school we had a self-directed math program called Individually Prescribed Instruction or IPI. In the program you would take a pre-test and based on the results do a set of exercises. Then you took a post-test to close out that section. What I realized is that since the exercises are self directed we had unsupervised access to the exercises and the solutions. When given the pre-tests I would look up examples in the exercises with the solutions to figure out how to do the questions. I then proceeded to speed run the whole IPI curriculum. This gave me a leg up in math. I proceeded to get a 100% on my Algebra regents and just generally crush it in math. Ended up getting a uni degree in math and physics. This opened many doors for me later in life.