Marzano is a bit like Snape. I can't tell if he's a good guy posing as a Death Eater or a Death Eater pretending to be good. I tend to agree with his conclusions, but his methodology and phrasing makes me sick to my stomach.  He's sort-of the opposite of Marx in that respect (whose diagnostic approach I agree with, but whose conclusions go awry - perhaps because he never worked hard labor in his life).

photo credit - this creative, mysterious pic is from red sunshine girl's photo stream on flickr creative commons