Sorry if this is in the wrong section or something, havent been to this forum for over a year. Ok, I am studying AS Physics at college, and we are on the radioactivity unit. The group I am in has a really really rubbish lecturer, and I dont think she has explained things very well. We are basically covering basic radioactivity, ie alpha, beta +/- and gamma. My friend, who has a different lecturer has covered basic quantum theory, ie up/down quarks etc as part of the radioactivity unit, and says that it is helping him understand it. Does anyone know of any particularly good sites/resources that starts at the basics, and gradually gets more complicated, explaining radioactivity from the group up? The problem with googling or using wikipedia is things either tend to be very simple, or throw you in at the deep end... Help much appreciated, Josh Davies.