books.google.co.uk - Using specific examples, Tufte explains how PowerPoint's templates "usually weaken verbal and spatial reasoning and almost always corrupt statistical analysis," and describes concrete ways to improve content of presentations....http://books.google.co.uk/books/about/The_cognitive_style_of_PowerPoint.html?id=3oNRAAAAMAAJ&utm_source=gb-gplus-shareThe cognitive style of PowerPoint
