Newsela is a service that aims to help teachers find current events articles that are appropriate for their students' age and reading abilities. On Newsela you can find articles by selecting a topic, grade level, and reading standard from a series of menus on the homescreen. The "standards" menu allows you to choose the reading skill or task that you want your students to develop. Many of the articles on Newsela have reading comprehension quizzes attached to them.
Applications for Education
Newsela has an online classroom component that you can use to assign articles to your students' accounts. A couple of months ago Beth Holland wrote a great overview of how to use Newsela in conjunction with Google Documents. You can read her article here.