
I learned about Simple English Wikipedia through my Twitter network. The link was passed around a bunch of times, but I think the first person in my network to post it was BudtheTeacher.
Applications for Education
Simple English Wikipedia could be a good reference page for elementary school students or older ESL/EFL students. Many teachers are still reluctant to let their students use Wikipedia, but as I've seen and heard David Warlick point out, Wikipedia articles come with disclaimers while most textbooks and encyclopedias do not. You can read more of my opinion about Wikipedia here.