Different types of kicks

Can any of you recommend a site where one can view a dolphin kick and other types of kicks with narratives to describe the proper way to do them? I ecently purchased a pair of Force Fins (slim fit) and think I'm going to love them for a good workout, but want to learn how best to use them. I've been told that they are good of course for the freestyle, and when you use them on your back, you should do the dolphin kick? Anyone have experience with these fins? They were very expensive, but I had done a lot of research on them, and they had a really good reputation and explanation on why these might be the best.:groovy: