This infographic investigates the cost of replacing textbooks with iPads in schools. The textbooks are considerably cheaper for schools as well as for students, even if iPads would replace clasroom computers as well.
Google Penguin: A Lesson It Teaches - iNFOGRAPHiCs MANiA
The Periodic Table Of SEO Success Factors [Infographic]: from the site: Want a neat visual representation of what matters in SEO these days? Here’s Search Engine Land’s recently updated ‘periodic table’ graphic