college student with slow processing speed, bad short term memory

Hello, I'm a 21 years old. I was diagnosed with a learning disability that made me eligible for 50% extended time on tests. The learning disability is related to weak short term memory and below average information processing speed. I also have trouble following what's going on in class; I have a habit of drifting and copying the board but not paying attention to what I am writing, which could be related to my condition but I'm not sure. Other than that, I do very well in school, but I would like to get sharper in these areas. Have these products been shown to work for young people like me? And if so, which product would you recommend most? Thank you for your attention.