Is there way to make my memory better

Im going to college right now and I can barely remember stuff I did in class especially math even though I study. Also i keep forgetting alot of stuff when I was high school and when i was younger my brother was talking about memories of when we were younger stuff that I should have remembered like when me and my brother were fighting on the roof of our house and I almost feel off I cant remember it all I feel like he was messing with me