You're a physics major? I'm a Journalism Student with an undying interest in physics. Unfortunately I was fighting my own personality in high school and did a lot of drugs which put me in a dark place but I did get out while not all of my friends did. Essentially, I wasted the best time to get into physics (I was in all the sciences) as I had myself convinced I was stupid and just wanted to get high all the time. I'm getting the opportunity to go to Uni after I finish my current program but I fear my math and physics knowledge are not on par with the program. Do you know of any good online courses or such to get my foot in the door before entering Uni? I'm especially interested in Astrophysics but I expect that's much more advanced and most likely currently unnecessary.