Categorizing requires a lot of higher-order thinking, and we use that instructional strategy a lot in my school with both English Language Learners and mainstream students. There have been several exceptional web tools that have come online this year that are ideal for students to use for this type of activity.
I explain how I use technology to deepen these lessons in The Best Social Bookmarking Applications For English Language Learners & Other Students.
Now I’m adding another one called Sitemark. It’s not quite as easy to use as Search Me, but is better than Middespot because it lets you display and describe images in addition to websites (Middlespot is planning on adding that ability, but it’s not there yet).