When I was in college I had to take a statistics class. I had to have math credits and for some outlandish reason I thought statistics would be the easiest one (FTR I HATE math!).
I went to each class and never missed one lecture. I recorded the lectures. I did all the homework and coursework. I attended all the peer study groups, bought "helpful" guides and saw my prof. during office hours weekly. Guess what? For the life of me I could not understand statistics. I failed every assignment, test and exam. Out of sheer frustration it became my mission to understand statistics. The more I tried the more I failed. I had all the tools and resources which I took full advantage of but I still was not improving.
On one of the last day of classes all of a sudden it ALL just made sense. I almost fell of my chair in class because it hit me like a wave. I have NO idea what clicked in my brain but something did and I just "got it".
The prof. actually said to me as I was walking out "the look I saw on your face during class is the reason I teach.. teachers live for that look" and I was like LOL! I GET IT! FINALLY!
People try and try and try and sometimes it takes longer to "get it" even though they are maximizing everything available to them.
