I'm a 10th grade student in the United States and currently taking geometry which is a breeze, and if anyone else reading this is in the U.S. you know that 10th graders haven't reached calculus yet, not even physics. Since i know i'm going into quantum physics, i have thirst to learn calculus before i actually enter the class in the next 2 years. I am not looking to master it by any means, but i really need a online program or a book that can introduce me to basic concepts of calculus. If anyone can give me some resources that aren't way to difficult i would appreciate it greatly! thanks.