Mr. Wilter is Rudy's teacher, and he's pretty well convinced Rudy's a big time slacker. Maybe that's because during most of Mr. Wilter's extremely long, extremely boring lectures, Rudy is busy drawing. Instead of seeing Rudy for the imaginative kid he is, Mr. Wilter thinks he's wasting his time. When you get right down to it, Mr. Wilter's kind of a snob, actually.