Really striking images with good short texts. The images can really motivate students to want to dig deeper and read the text.
From the Boston Globe "The Big Picture" web pages, collections of some of the most amazing photographs that range from natural wonders to political events. The page includes an RSS feed, a comments section, and archives are also available.
"This is the US Teachers' Guide for using the Professional Cartoonists Index web site in your classes. We have developed lesson plans for using the editorial cartoons as a teaching tool in Social Sciences, Art, Journalism and English at all levels."