You want to point out something specific in the speech that was wrong? Well, I could tell you the answer, but, as the Riddler (Jim Carrey) so eloquently said to Two-Face (Tommy Lee Jones) in Batman III, "then you wouldn't learn nothin'" <s>
Here's a hint: try to put yourself in the position of one of the mischievous little devils to whom Obama was addressing - then read his speech again - and you'll realize it comes across more like the sounds of the teacher in the old Charlie Brown TV specials, where it sounds like a robot saying, "mmm-wwaaaa---wwaaaa-waaaaaaa".
I have some experience with this. I've worked with kids before, unruly kids who weren't the stellar academic juggernauts I'm sure you raised - there are ways to converse with them and get their attention. It's a craft....and Herr Obama doesn't have it. For that matter, Obama doesn't have much at all....only millions of voters who were hacked off at Bush.