I’m not quite sure what I’m doing on this forum. I was sent a gift subscription to a science magazine and was so delighted with it; I gave a grandson a subscription to the same magazine. We get into lively discussions regarding the contents of the various issues. He challenged me to read Stephen Hawking’s, “A Brief History of Time”. I contacted a friend who is a physics professor in a university. He in turn recommended several books for an elderly person who is becoming interested in physics. This past week I have read 3 of Richard Feynman’s books, Michio Kaku’s “Parallel Worlds”, and Steven Hawking. Freeman J. Dyson will have to wait until January. I thought perhaps I could take an online course in beginning physics but knew I would need some math background. In a Goodle search for mathematic prerequisites for physics this forum popped up. I’ve read a number of the posts and find them very intriguing. I don’t know how this forum can help me. Do you actually teach the courses? Or are you just a support for students and researchers? I haven’t found an “About Us” page, which describes exactly what the forum is all about, and where to start, even though I have discovered hundreds of interesting topics. I live about 130 miles from the closest university, and at my age and the weather, driving is not an option. I did take algebra and geometry in high school in the 1950’s. (Grin) I am sure I will need to repeat them.