I was very discouraged when I couldn't do a couple proofs myself in calculus such as the squeeze theorem. My textbook has very little steps into some of the proofs and assumes that the student should infer most of the information. Not being able to follow the proofs made me feel that I hated them. But I went to khan academy and followed their proofs and it was much more helpful! I liked the squeeze theorem proof immediately. I need a source that would help ease my way into proofs and help me mature mathematically. I'm very new to the whole proof concept. Any ideas?