Quote From: laf5235My son is 20 months old and I can't get him to stop screaming/screeching when he wants something. I taught him to say please and I was hoping that it would replace the screaming. But now he screams/screeches and then says, "please." My husband gets frusterated with him, especially in public and more than once I've caught people staring. How do I get my son to stop the screeching? 
Hi. I think that sounds like a toughie. I mean, he is so young still and that makes it hard. I would say whatever you do, don't let him have what he wants when he screams/screeches. That will only make him think that he just needs to keep it up. I would personally take a really close look at what my reaction is when he does it. You know..do you simply say no, do you find yourself giving in sometimes? I really like your idea of having him say please...lol, they are smart little ones aren't they? Now he screams and then says please.
I almost think that this might be a situation where putting him on ignore might be good. I once went to a child psychologist and I remember him telling me when my daughter was having a fit, that as long as she isn't hurting herself, that it is okay to ignore them for awhile just to let them know that what they are doing to seek attention isn't working. You know what? It worked. She stopped throwing fits when she saw that it wasn't giving her the attention she wanted. I hope this helps. Good luck to you!