I was wondering if someone could suggest some good sites that would help me with my advanced mathematics class. I am learning about logic and proofs(i.e. Propositions, conditionals, quantifiers, basic proof methods, etc) and Set thoery (i.e. set operations, basic concepts, induction, indexed families of sets, etc). I really don't understand these topics and would like some addtional help. So anything you can suggest would be much appreciated!