I have always wondered how to put a zipper in. I don't know why I didn't think of checking out YouTube earlier. After searching for online classes, I found this lady and her videos. This is only one. She has others for other types of zippers. Check them out if you too have been wondering :0)
p.s. I didn't win my sewing machine auction (surprise*surprise-I always lose them right at the end) so now I am completely obsessed with finding a new machine. I am leaning toward a Janome, slightly less than a Bernina, but has equally good reviews. Wish me luck!